lunchroom

lunch +‎ room

lunchroom (plural lunchrooms)

1. A room designated as a place to eat lunch.

   Company policy was to eat snacks only in the lunchroom.

2. A diner or small restaurant that serves lunch.

   I don't know how they stay in business serving only lunch, but the lunchroom on the corner is cheap and fast so I like it.

• (room reserved for eating lunch): break room, comfort room (in some contexts); cafeteria (in some contexts)

• one-arm lunchroom

• lunchware

• cafeteria
• dining hall