Tip airport valets or hotel bellhops $1 to $3 per bag (there typically is also a charge to check bags outside the terminal, but this isn't a tip). Maids often get $1 to $2 per night per guest, more at high-end resorts or if you require special services, ideally left each morning since the person servicing your room or suite could change from day to day during your stay. Room-service waiters still hope to receive a 15% tip despite hefty room-service charges and service fees, which often don't go to the waiters. A door attendant or parking valet hopes to get $1 to $3. Waiters generally count on 15% to 20% (on the before-tax amount) or more, depending on your demands for special service. Bartenders get $1 or $2 per round of drinks. Golf caddies get 15% of the greens fee.