Editorial Note: Possibly specific to the TGI Friday’s restaurant chain. Etymological Note: Clipped pronunciation of first letters of waiter and waitress
Citations:
2000 Jeremiah McAuliffe @ Pittsburgh Usenet: pgh.food (Apr. 22) “Re: Monterey Bay, general ranting.”: After the classroom training, you followed a “top ten” waiter/waitress (w/w-- pronounced dub-dub) around for a week before you could even wait a table yourself. *2004TGI Friday’s (Watford, U.K.): Arzu is a “dub-dub” at TGI Friday’s. Derived from the abbreviation for waiter/waitress—"W/W"—"dub-dub”. 2004INQ7.net (Makati City, Philippines) (May 22) “Minding the (bar) business”: Thus when a slot was opened at Alabang where he was a dub-dub (or server in Friday’s lingo), he grabbed the opportunity.