Rio Lisboa, 4700 Eastern Ave., (410) 522-5092. You can have a lot of fun and a lot of good food without spending a lot of money at Rio Lisboa, the Brazilian-Portuguese restaurant on Eastern Avenue. It's a lively place with big art on the walls, friendly servers and a clientele that seems happy to be there. For newcomers, the menu, with only brief English descriptions, is a little baffling, so plan to ask a few questions. Plan, too, to go when you are hungry; the portions are large, the side dishes numerous and the flavors captivating. The churrasco misto, a mixed shish kebab, offered a chicken breast, a pork chop, a small steak and some wonderful sausage. All delicious. $$ -- moderate. (Last visited 2/92). Nam Kang, 2126 Maryland Ave., (410) 685-6237. Most of Nam Kang's customers seem to be Korean-Americans, so the menu isn't geared to those who are newcomers to Korean cuisine. Expect a good but fiery meal. Start with kim chee, an assortment of colorful, pickled and highly spiced vegetables. Follow it with a clear soup, a Korean pancake as big as a plate, one of the assorted seafood dishes or bulgoki, thinly sliced barbecued beef. $ to $$ -- inexpensive to moderate. (Last reviewed 3/92).