the.com/checkroom

means A room, usually near the entrance of a theater, restaurant, or other venue, where you temporarily hand over your coat, bags, or other belongings in exchange for a claim ticket.

from A straightforward American compound from 'check' (in the sense of a receipt or token proving a deposit, as in 'bag check' or 'hat check') plus 'room.' This 'check' traces back to the old chess term for putting a king in check, which drifted over centuries toward meaning any mark or token used to verify or control something — a sense still alive in 'rain check' and 'check mark.' 'Checkroom' itself emerged as American English in the early 1900s, right alongside the rise of coat check counters in hotels, theaters, and train stations.