looking for a string quartet to perform at an on-campus party

I'm the Community Manager at Kairos and every other Wednesday we put on Wine and Cheese, an all-campus party. Normally we have live bands or DJs do ~70 minute sets, but we thought it'd be fun(ny) to class it up for the Week 7 (Feb. 20) Wine and Cheese and have a string quartet perform instead. We also don't have the funds to pay for our musical acts -- the bands always essentially play for free/for the fun of it and for the free wine. The quality of the quartet doesn't need to be super high caliber. But if it is high quality, omg awesome.