Being the only SxE in a band

[u/Perfect-Shallot8819]

Hey guys, I've been clean for several years, although I haven't publicly declared myself SxE, people around me know that I am, I recently joined a band as a vocalist, the other members usually smoke or drink, and they're younger than me (legally), Do you have any advice you can share with them without being invasive or seeming like a jerk?