Bangkok Joe's is a great Thai restaurant on the Georgetown Waterfront. One thing that's nice about it is that it's located far enough from M ST to avoid (or escape from) the crazed shoppers and tourists. I love coming by for its happy hour which is from 5-7pm every day of the week. Be sure to sit at the bar as it's full-price if you sit elsewhere. The deal is great: All of their specialty drinks, regular cocktails, draft beer and wine are half-price and they also offer some enticing small plates of food for $2 and $4. Over the summer I'd come by for their mojitos which are perfect for DC's dog days. There's just enough sweetness to give it a refreshing brightness but it lets the rum and mint play front stage and they add just a touch of club soda to give it a little fiz. And for about $4 each during happy hour, what more could you want?
Try their Bangkok Swing which has received some national acclaim having been featured in the "Best American Recipes Book 2005-2006: Top 10 Favorite Recipes." I'm not the biggest fan of Southern Comfort, but it plays well into the blend of Absolut Citron, and their homemade ginger-lemon tea.