Mai's The bars have closed, and the munchies have your stomach growling -- roaring -- for something more than just a burger from a drive-thru window. Although late-night dining used to be an oxymoron in Houston, now there are a bunch of spots in the downtown area. Judging by its loyal and lively wee-hours crowd, unpretentious Mai's seems to be a favorite for bleary-eyed party animals. On the southern end of downtown, Mai's stays open until 3:30 a.m. on weekends and 3 a.m. on weekdays, serving Asian fare such as soft spring rolls, light choose-your-own-topping vermicelli and savory stir-fry vegetables with noodles. You'll dine among folks in dinner jackets, jeans and tattoos, and just about everything in between.