I am finishing up a summer with the Shiley Center for Orthopaedic Research and Education (SCORE) at Scripps Institute in La Jolla, CA. I got to be involved in multiple projects and have learned so much, and it has been a ton of fun as well! I already knew someone there and had an "in", but there were a handful of other students there for the summer as well, so surely it's possible to get involved with them.
I take it you are asking for next summer's purposes, yes?