title: get a random venue with foursquare API
body: <p>i try to find a  way to find random venue to post random check-in with a php script.
  I have tried with a random Lat/Long but most of my try have finished into ocean, even if i use the radius parameters to extend the area os research.</p>
  
  <p>Any ideas?</p>
  
  <p>Thks.</p>