How to discuss with my roommate house rules about random people coming in?

My roommate who I’m friends with she’s always been a fun/cool person we were randomly paired freshman year and we moved off campus together for our final year this year. She started stripping I don’t know why... which I mean whatever it’s sex work if she’s fine ok I guess. But she’s starting to bring randoms back to the apartment at like 1am when I’m coming home from work which has made me really uncomfortable. But I didn’t want to be a bitch about who can and can’t come into the apartment... what to do?
How to discuss with my roommate house rules about random people coming in?
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