Foursquare has partnered up with VH1's Save The Music Foundation to raise money through check-ins.
All you have to do if you're a Foursquare user is follow VH1 on Foursquare, and check-in to a music venue (or specific concert, since Foursquare just started to let people check in to specific events). Once you do that, VH1 will give $1 to the foundation:
Love going to concerts? Now you can save the music while you’re at it. The VH1 Save the Music Foundation is a non-profit organization dedicated to restoring instrumental music education in America’s public schools. For the months of March and April, VH1 will donate $1 when you check in to any concert or music venue across the country.
As you can see, the promotion runs for the next two months. During that time there will be plenty of chances for Foursquare users to check in to venues - both SXSW and Coachella are happening within that window.
VH1 kicked off Save The Music back in 1997, and the foundation works with school districts by providing new musical instruments for dormant music programs. Through their negotiations, they garner commitments from school districts to fund salaries for music teachers and work music classes into the daily schedule.
If saving the music isn't enough of an incentive to check-in, Foursquare is also offering a new badge for doing so (seen above).