Under no circumstances should you limit your dining, and presumably drinking, options to the Crystal City area. It's not that much different than the high density suburban sprawl you'll find around any other largish American city.
From Crystal City on the Metro yellow line, you've got 5 stops north to Chinatown/Gallery Place (
Metro map) - where there are a ton of somewhat unique dining and drinking options, as well as some of the more fun cultural places (Portrait Museum and Spy Museum).
Here is one of the more easy to navigate city guides on DC:
WaPo Going Out Guide. You can put the dates of your visit in and see what events are going on.
If you let me know your interests in food (e.g. Malaysian) and/or drink (e.g. craft beers). I can make some particularized suggestions.
Feel free to PM me if there's anything further I can help out with.