Huh, who would be the ones to take the train to the sweet sweet dank.

Gamzee for one. He needs to stay high, and it’s for the best if he was.

I can see Dirk smoking some, though not Dave. Rose would for Passive Aggressive reasons, not Roxy since she has her alcoholism.

Nepeta would, since it is like catnip for people. Equius would try to be a nark about it, but then end up taking some too. 

Sollux absolutely fucking would, there is no way he could refuse. Hell, I am pretty sure he can do come weed tricks from smoking so much.