The 20-pound bags of rice stacked near the door of this stuffed-to-the-rafters grocery are just the beginning: Dan Mar carries tostada shells, beans, fresh chicken and beef, baked treats from El Dorado Bakery, and fruit and vegetables. There are spices, chile pods, toasted seeds, saffron and dried peppers from El Gallon and La Flor; Boing! brand guava and mango juices; several kinds of beans, rice, cornmeal and olives from Goya, and adobo and pipian sauces from Dona Maria. The store also sells dairy, household goods and beer.