A gratuity is a sum of money customarily given by a customer to certain service sector workers such as hospitality for the service they have performed, in addition to the basic price of the service.
Leaving some change on the restaurant table is one way of giving a gratuity to the restaurant staff.
Waiters in Breslau, Germany (now Wrocław, Poland), in 1913
Buskers often punctuate their performances with requests for tips.
Coat check staff are usually tipped for their service and this photo shows a coat-check area at the Berliner Congress Centrum (BCC) in Alexanderplatz, Berlin, Germany.
Waiting staff (BrE), waiters / waitresses, or servers (AmE) are those who work at a restaurant, a diner, or a bar and sometimes in private homes, attending to customers by supplying them with food and drink as requested. Waiting staff follow rules and guidelines determined by the manager. Waiting staff carry out many different tasks, such as taking orders, food-running, polishing dishes and silverware, helping bus tables, entertaining patrons, restocking working stations with needed supplies, and handing out the bill.
Miami Beach waitress , coordonated by Maitre D’Hotel Florin Paczai, in 1973
A waitress in a hotel, North Korea
A Swedish waitress, 2012