Four of us descended upon this Riverdale, MD dive in PG County's Little Mexico area. We had a great time, and everything we ordered was good.
I am defintiely tempted go back and explore more, although I do not feel compelled to revisit the items we had this time. We had:
"shampoo" soup, with seafood, beef, and spaghetti. (VERY spicy)
Posole, a hominy and pork soup (bland at first, but the addition of radish, lettuce and tortillas made it satisfying)
Chicken Mole, (big, meaty legs with a rich sauce)
Chilaquiles (tortilla chips almost soaked in a red sauce with a bit of white cheese on top.)
Chili Relleno (good stuff)
Orders of tamarindo and agua de melon to drink produced impressive personal pitchers with ice and a straw. Glass optional.
The fact that the rice and beans are well-made and tasty already puts this place ahead of most closer alternatives.
As a counterpoint to other postings on La Sirenita, the service was excellent and went beyond the call of duty. Knowing some Spanish (thanks Rebecca) pays off. They even turned down the level of the sound system in our honor. From 10 to at least 8.