Los Dos is tiny. There are a half a dozen tables covered in plastic tablecloths, several booths along the wall, and a six-seat Formica counter in the L-shaped dining room. Breakfast and lunch are booming. Breakfast tacos are 99 cents, and the breakfast specials are $3.25 until ten o'clock. But forget the bargains — you have to order the three enchiladas topped with two fried eggs and raw onions for $7.25. The eggs on enchiladas aren't on the breakfast menu; they're listed with the entrées. It's the best enchilada plate in the city, and the desayuno de campiones. For a change of pace, stop in on Wednesday, when the $5.75 daily lunch special is enchiladas suizas, three chicken enchiladas in a white cheese and sour cream sauce with beans and rice. They don't serve frozen margaritas, and there isn't any beer either. So you can have the eatery pretty much to yourself at dinnertime.