Meat lovers will be mesmerized by the succulent offerings in Rio's churrascarias (restaurants where meats are roasted on spits over an open fire), especially those that serve rodízio-style (the meat is brought to your table on skewers continuously -- until you can eat no more). Hotel restaurants often offer feijoada -- the stew of black beans, sausage, pork, and beef that is Brazil's national dish -- on Saturdays (sometimes Fridays, too). For vegetarians there is an abundance of seafood restaurants and salad bars, where you pay for your greens by the kilo. (It's perfectly safe to eat fresh produce in clean, upscale places; avoid shellfish in all but the best restaurants.) Cariocas have scaled back on almoço (lunch), which used to be a full meal, and have turned more to lanche, meaning a sandwich. Dinner is late; if you arrive at 7, you may be the only one in the restaurant. Popular places seat customers until well after midnight on weekends, when the normal closing hour is 2 AM. As for tipping, check your bill: A 10% service charge is often added, and it's customary to leave up to an additional 5%. Note that some restaurants don't accept credit cards, many are closed on Mondays, and dress is almost always casual.