Just check out www.pghdance.com and see what a fine schedule there is pretty much every week. And I hasten to say that there's much more going on than is just on their calendar, but I'm not sure I can manage to go dancing more than 3-4 times a week. So far I've managed twice a week; maybe this weekend will lead me into the 3-4 time range.
There's no need to bring a partner, or to have ever done this before. Just show up in time for class and all will be well.