Whether you're hungry or just drunk, Tacos El Gordo is a great place to get your fixing of tacos. It's located just past Wynn in a small strip mall with plenty of parking. I can imagine the line can be a long wait if you arrive at peak hours but we waited about 20 min at 11:00pm. They have one line but multiple stations and you just order at each station the food you want and pay at the cashier near the exit. Seating is limited.
Be sure to ask for the grilled onions and hot chili peppers (green one has a lingering kick so be careful)
The Mrs and I ordered abodaba and asada and they had guacamole, onions, and cilantro for an awesome $2.00 tacos each. I highly recommend this place and avoid the other touristy spots.