There is an app for that. Forgot what's it's called though
AirBnB or couchsurfing
I would have suggested Grindr.
Just post that you are in town to do some grappling for a few weeks and need a place to crash.
Lol, there's a pretty prominent gay wrestling team in SD, so it would probably work
Hey, I train at the University and can help you answer some questions. Shoot me a PM and I'd be happy to help.
UkGrapple, there's a BJJ Hostel in San Diego that you could check out. Website at http://bjjhostel.com
Chumsgum, Xande teaches on Monday morning and evenings.