El Mariachi
El Mariachi, web site, 765C Rockville Pike, by Wootton Parkway, Rockville, MD, 301-738-7177 (Metro Trip Planner - opens in new window) [Washingtonian | City Paper | food-plan | openlist | Yelp | Gayot]
Many (not all) people love this place, and it is usually crowded. I have yet to go.