A lobby, a kitchen, and a great many rooms with doors that lock — hospitality cases where everyone is a stranger.
Reception, the restaurant floor, the kitchen and its pass, a bar, guest rooms along a corridor, a service area guests never see. The hotel gives you a cast with no reason to know each other, which removes the usual shortcut of asking who had a motive and leaves only where each of them physically was.
Corridors and repeated guest rooms make this theme unusually good for adjacency reasoning: a long thin plan means room-neighbour clues carry real information. Watch for the split between front-of-house and back-of-house — a clue about the kitchen is often a clue about the staff.
A case picks its floor plan from this theme’s room pool, so the same places recur across the drawer and you learn to read them: Lobby, Front Desk, Restaurant, Bar, Suite, Kitchen, Wine Cellar, Terrace, Roof Terrace, Spa, Gym, Luggage Room, Breakfast Room, Elevator, Laundry. No single case uses all of them — the generator and the hand-built cases alike take a subset, which is why two cases in the same setting can still feel unalike.
9 cases — 2 easy, 3 medium, 4 hard, on boards from 4×4 to 10×10. Every one is verified to have a single solution reachable by forward deduction alone, so none of them needs a guess.