An apparatus of this invention is directed to an information processing apparatus that proposes an action to reduce an energy consumption amount by users of a system when an acceptance user proposes a place for accepting users. The information processing apparatus includes an acceptance information acquiring unit that acquires a proposal of an acceptance place accepting a plurality of users, a user position collector that collects the current positions of the plurality of users from communication terminals of the plurality of users, and a guidance information notification unit that selects the acceptance place as a place for gathering the plurality of users, and notifies the communication terminal of a user absent in the selected place of guidance information to the selected place.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An information processing apparatus comprising: an acceptance information acquiring unit that acquires a proposal of an acceptance place accepting a plurality of users; a user position collector that collects current positions of the plurality of users from communication terminals of the plurality of users; and a guidance information notification unit that selects the acceptance place as a place for gathering the plurality of users, and notifies the communication terminal of a user absent in the selected place, of guidance information to the selected place. 2. The information processing apparatus according to claim 1, wherein said acceptance information acquiring unit further receives the guidance information from a communication terminal of the acceptance place. 3. The information processing apparatus according to claim 1, wherein the acceptance place comprises a plurality of acceptance places, and said guidance information notification unit includes an assigner that assigns the plurality of users to the plurality of acceptance places, respectively, and notifies guidance information to the assigned acceptance place. 4. The information processing apparatus according to claim 3, further comprising a history accumulator that accumulates action histories or purchase histories of the plurality of users, wherein said assigner assigns the plurality of users to the plurality of acceptance places, respectively, in accordance with user preferences based on one of the action histories and purchase histories of the plurality of users. 5. The information processing apparatus according to claim 3, wherein said assigner includes a first energy consumption amount predictor that predicts energy consumption amounts corresponding to the numbers of persons to be accommodated in the respective acceptance places, and assigns the plurality of users to the plurality of acceptance places, respectively, to minimize a sum of the energy consumption amounts predicted by said first energy consumption amount predictor for the respective acceptance places. 6. The information processing apparatus according to claim 3, wherein said assigner includes a second energy consumption amount predictor that predicts energy consumption amounts to be consumed by the respective users to move from the current positions to the one place, and assigns the plurality of users to the plurality of acceptance places, respectively, to minimize a sum of the energy consumption amounts predicted by said second energy consumption amount predictor. 7. The information processing apparatus according to claim 1, wherein the guidance information includes a reduction amount of the energy consumption amount, ongoing event information, bargain sale information, and reward point information. 8. The information processing apparatus according to claim 1, wherein said guidance information notification unit includes a region generator that generates a plurality of regions where energy consumptions become different in different time periods, and notifies a communication terminal of a person present in a second region, of guidance information to a first region, so as to move the person present in the second region to be in a time period in which energy consumption can be reduced, to the first region to be in the time period in which energy consumption is required. 9. The information processing apparatus according to claim 8, further comprising an energy price controller that sets an energy price in the first region to be lower than an energy price in the second region in the time period. 10. The information processing apparatus according to claim 8, wherein the plurality of regions include a housing area where people reside, a business area where offices serving as workplaces are gathered, and an amusement area where restaurants and amusement facilities are gathered. 11. A control method of an information processing apparatus, comprising: acquiring a proposal of an acceptance place accepting a plurality of users; collecting current positions of the plurality of users from communication terminals of the plurality of users; and selecting the acceptance place as a place for gathering the plurality of users, and notifying the communication terminal of a user absent in the selected place, of guidance information to the selected place. 12. A storage medium storing a control program of an information processing apparatus for causing a computer to execute a method, comprising: acquiring a proposal of an acceptance place accepting a plurality of users; collecting current positions of the plurality of users from communication terminals of the plurality of users; and selecting the acceptance place as a place for gathering the plurality of users, and notifying the communication terminal of a user absent in the selected place, of guidance information to the selected place. 13. An information processing system comprising a plurality of communication terminals of a plurality of users, and an information processing apparatus that controls said plurality of communication terminals, said information processing apparatus comprising: an acceptance information acquiring unit that acquires a proposal of an acceptance place accepting a plurality of users; a user position collector that collects current positions of the plurality of users from said communication terminals of the plurality of users; and a guidance information notification unit that selects the acceptance place as a place for gathering the plurality of users, and notifies said communication terminal of a user absent in the selected place, of guidance information to the selected place, and said plurality of communication terminals comprising: a user position transmitter that detects the current positions of said plurality of communication terminals and transmits the current positions to said information processing apparatus; and a guidance information receiver that receives, from said information processing apparatus, the guidance information to the selected place. 14. An information processing method using an information processing system including a plurality of communication terminals of a plurality of users, and an information processing apparatus that controls the plurality of communication terminals, comprising: detecting current positions at the respective communication terminals and transmitting the current positions from the respective communication terminals to the information processing apparatus; collecting, at said information processing apparatus, the current positions of the plurality of users by receiving the current positions from the plurality of communication terminals; acquiring, at said information processing apparatus, a proposal of an acceptance place accepting the plurality of users; selecting, at said information processing apparatus, the acceptance place as a place for gathering the plurality of users, and notifying from said information processing apparatus to the communication terminal of a user absent in the selected place, of guidance information to the selected place; and receiving, at the communication terminal of the user absent in the selected place, the guidance information to the selected place from the information processing apparatus.