Umami has wonderful buns. They taste great, and who doesn't want to meet friends at a place where you can make semi witty jokes about buns.
They only take reservations for 6+ so all the more reason to make this your dinner with friends spot.
The atmosphere is great. It is cute and hipster, so everything you want from Willy Street.
I don't exactly see eating lots of hot carbs and then wanting to dance, but it is right across the street from Plan B, so I suppose if that sounds appealing to you, it would be awfully convenient.