No problem continuing to go, but if it were me I'd minimize or eliminate any drinking and if I do have ANY beverage (alcohol or non-alcohol) I would make my own drinks and if they were out of my sign for even one moment I would make a new drink. Since their lifestyle is not your cup of tea then it would be proactive to make sure anything you ingest has been made for you and only handled by you.

If there was one word to describe this music group it would be "problematic."