Leisure Suit Larry 3 **NSFW**
When you get onto the 'Passionate Patti' part of the game, there's a quicker way to get into Chip & Dale's.
You need to have answered the 5 questions at the beginning of the game correctly so you're on the 'Totally Raunchiest' level for this to work.
Go to the Maitre'd and type 'SUCK COCK' then answer 'YES'.