London

London's casino scene sits apart from the continental pattern in this atlas: rather than a single grand civic house, the city holds a scattered handful of licensed casinos ranging from large, theatrical West End venues to small, formal private members' clubs. The Hippodrome, a converted 1900 Frank Matcham variety theatre on Leicester Square, represents the former — multiple gaming floors behind a preserved Victorian façade, built for a broad tourist and West End evening crowd.

The Ritz Club, tucked beneath the Ritz Hotel on Piccadilly, represents the latter tradition: a small, Louis XVI-styled gaming room operating on a private-members basis, closer in spirit to a discreet hotel amenity than a public entertainment venue. UK gambling law also differs meaningfully from most of the continent — same-day entry with photo ID is standard, without the passport-checkpoint formality found at many historic European houses.