regular
n. countablen. a person who visits a place very often, like a specific café, bar, or shop. The staff usually know this person's name or what they like to order.
n. a frequent customer or visitor to a specific establishment. Informal in register when used to describe social patrons.
The bartender already had a drink ready for the regular.
As a regular at the local library, he knew exactly where to find the newest mystery novels.
The café relies on a loyal group of regulars who provide a steady stream of revenue even during the slow winter months.
From Middle English reguler, from Anglo-Norman reguler, Middle French reguler, regulier, and their source, Latin rēgulāris (“continuing rules for guidance”), from rēgula (“rule”), ultimately from Proto-Indo-European *h₃reǵ- (“move in a straight line”).
Commonly used in hospitality and retail contexts to distinguish repeat customers from one-time visitors.