Leo Clubs are an extension of the Lions service organization which aims to encourage community service and involvement from a young age. Much like Lioness Clubs, Leo Clubs are sponsored by a parent Lions Club. Leo Clubs are a common school-based organization with members between the ages of 12 and 18 from the same school, these are commonly referred to as "Alpha Leo Clubs". Community based clubs also exist; these generally cater for 18- to 30-year-olds, and are referred to as "Omega Leo Clubs". Leo Clubs are required to have a Leo Club Advisor, a member of the sponsoring Lions Club who attends meetings and provides general advice to the club. Lions International includes more than 250,000 Leo club members in over 150 countries.