Food and/or drinks by Natural History Museum on a Sunday?
If you're okay having your meal sans alcohol, go to Chichen Itza in Mercado La Paloma on Grand, just a few blocks from the museum. http://www.chichenitzarestaurant.com/
The Mercado has both shops and food stalls, mostly food of Mexico, but I think there's a Thai stall in there as well. Chichen Itza's food is amazing, fresh and prepared from scratch. You order at the counter and they bring your meal to you. I volunteer at the museum, and we go there for lunch at least once a month. I'm working at eating my way through the menu, everything I've tried has been delicious.