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The amount tipped to the caterer may vary based on the length of time spent at your event, but a proper tip may be a percentage of the bill, or offered as a per-server gratuity -- a set amount per server -- 15 to 20 percent of the total bill, or up to $50 per server.
Tip $1 or $2 per guest per night in most hotels. At higher-end properties, $3 to $5 per guest per night is typical, says Lillian Africano, president of the Society of American Travel Writers. If your visit is longer than three days, tip each morning so the right housekeeper receives it.