Food and beverage service workers, as well as hosts and hostesses, maids and housekeeping cleaners, concierges, and baggage porters and bellhops, derive their earnings from a combination of hourly earnings and customer tips. Waiters and waitresses often derive the majority of their earnings from tips, which vary greatly depending on menu prices and the volume of customers served. Many employers also provide free meals and furnish uniforms. Food service personnel may receive extra pay for working at banquets and on other special occasions. In general, workers with the greatest skills, such as restaurant cooks, have the highest earnings, and workers who receive tips have the lowest.