Wendy's Blitz Snarlton Hotel
From the Super Mario Wiki
Wendy's Blitz Snarlton Hotel is a hotel found in Hotel Mario, owned by Wendy O. Koopa. The name is based off of the real-life Ritz-Carlton Hotel. It resembles a casino. Enemies found in there are Bellhop Goombas, Z Koopas, Mecha Koopas, Rhinestone Goombas and "pennies". After Wendy is defeated, the hotel vanishes. The Mario Brothers made it out in time, but Princess Toadstool is taken away by Bowser.