Dec Gaucho Festival , Gral. The most common form of greeting between friends is kissing cheeks. When invited to somebody's house it is quite common to take a homemade dish or dessert. Dinner is usually served between 2100-2200. Dress is not usually formal, though clothes should be conservative away from the beach.
Formal wear is worn for official functions and dinners, particularly in exclusive restaurants.
Smoking is prohibited on public transport, in cinemas and theatres. In these cases, a minimal tip is still expected. The same applies in bars. Taxi drivers tend to expect tips from visitors.