Casablanca gambling? I'm shocked!

Classic Casablanca scene

Rick How can you close me up? On what grounds?
Captain Renault I'm shocked, shocked to find that gambling is going on in here!
[a croupier hands Renault a pile of money]
Croupier Your winnings, sir.
Captain Renault Oh, thank you very much.

Captain Renault Everybody out at once!