DC Redditors, I need your help for an event location.

Hello DC Redditors! Hope you're having a great day so far.

I was put in charge of planning a formal for 40-50 people and I have no idea where to have it. Here's some information to help:

1. My budget is around $2,000
2. No dinner is necessary. It is a university formal, so basically we're looking for a dancefloor and an open bar.
3. Not everyone is 21, so a place lenient on id's would be wonderful.

Any ideas would be greatly appreciated!