Ivory Room is definitely a good time, but there's always a $5 cover (like others have mentioned, you can grab a drink at Capital Tap Haus first and get a voucher for free entry), and sometimes there is a wait, too (even when it doesn't look that crowded). I also don't love that there's not much room to dance, because most of the bar is filled with seats, and it's hard to weave through people and tables. Also, it's not something you can do every weekend... they play a lot of the same songs.