I'm sure there are...Fabswingers is the main one I know of. There are quite a few venues dotted around that you can visit for swingers events and you can decide your limits, just watch, or soft or hard play with other couples or singles.
This forum is generally for single guys looking for paid fun, but if you're looking for a guy or guys to join you both for free, you will likely get some takers on here. Just state time & location and make arrangements by PM (Private Message).