Restaurant servers are usually bound by a dress code, but that code can be more or less bound by propriety. For example, Hooters waitresses (they're always waitresses) are expected to don skimpy attire and show a lot of cleavage. Other wait staff are outfitted more like the several bland and unassuming food servers pictured to your right. (The sketch looks like a pencil doodle of someone's coworkers done on an order pad during a dining lull.) And not to stereotype people here, but, much like librarians, you'll often find these folks with their hair up in a bun, wearing comfortable shoes. (Food for thought, anyway.) We were served 29 portions of our typo du jour in OhioLINK today, and over 500 in WorldCat.
(Drawing of "waiter and waitress dressing" by Vorzinek/F. Cecconi, from Wikimedia Commons.)