701 in Penn Quarter used to have a piano bar, and if they still do, it is a very nice space.

I haven't been there yet, but its Yelp reviews look pretty good (and it's not exactly a piano bar), but I just learned that a former colleague of mine is part owner of:

http://www.blackfoxlounge.com

I'm surprised that I hadn't heard of this place earlier, but it sounds great and I'm hoping to stop by this weekend.

Looking for a piano bar in DC where a friend and I can go for some great cocktails. Location pretty flexible: Penn Quarter, Logan, Dupont, etc. thanks!