Exploratorium and Academy of Sciences in SF have adult nights I believe. I remember attending a Yelp Elite event back in the day at the Exploratorium at night and it was pretty fun.

Back when big tech did Christmas parties but before they had hired so many people they wouldn’t all fit in a museum (thus requiring the renting of hangars), we booked this whole place for the night. It was great as everyone was dressed to the nines and drinking while the staff taught us about fish and quasars or something.