Wages can be paltry in Brazil, so a little generosity in tipping can go a long way. Tipping in dollars is not recommended—at best it's insulting; at worst, you might be targeted for a robbery. Large hotels that receive lots of international guests are the exception. Some restaurants add a 10% service charge onto the check. If there's no service charge, you can leave as much as you want, but 15% is a good amount. In deluxe hotels tip porters R$2 per bag, chambermaids R$2 per day, and bellhops R$4–R$6 for room and valet service. Tips for doormen and concierges vary, depending on the services provided. A good tip is around R$30, with the average at about R$15. For moderate and inexpensive hotels, tips tend to be minimal (salaries are so low that virtually anything is well received). If a taxi driver helps you with your luggage, a per-bag charge of about R$1 is levied in addition to the fare. In general, you don’t tip taxi drivers. If a service station attendant does anything beyond filling up the gas tank, leave him a small tip of some spare change. Tipping in bars and cafés follows the rules of restaurants, although at outdoor bars Brazilians rarely leave a gratuity if they have had only a soft drink or a beer. At airports and at train and bus stations, tip the last porter who puts your bags into the cab (R$1 a bag at airports, 50 centavos a bag at bus and train stations).