I like yoga but I don't feel that it's a super social activity. Maybe I just go to the wrong studios. Do you find that you talk a lot with other attendees? Or do you think the yoga itself is social?
There is a parallel lingo and phrasing associated with them, that they gravitate towards if you speak that way.
Its a decent way to begin to see the same people in multiple places, which has a couple of benefits between you and them, as well as others around (or being introduced to others).
And finally, a yoga session is an okay date or social activity to bring someone else to.