McMullan's probably has one of the best happy hours in town. Great prices on the food, and a rotating drink menu make a perfect late night spot.
Like a couple fellow yelpers mentioned, the HH item to order are the nachos. This plate is massive, even the smallest serving, the mini could easily feed 2-3 people. I remember ordering the full order once and pretty much everybody at the place was starting at the foot-high mound of potato chips and cheese. At around 7 bucks, you can't beat it. If your a wing person, try out the 12 wings, each tossed in a different flavor. Lemon-pepper was my favorite.
The rotating beers on tap are a nice touch. Each night they put a special brew up for 4bux. The place can get really noisy and busy on the weekends. Certain night they have bands come in, and if there is soccer on, the place is packed.