Joe moved to a new town and was having a hard time making friends. Recently he met some people he really liked at a party. They started smoking marijuana and offered him some. He smoked the marijuana, even though he didn't want to.

What should Joe do the next time this happens in order to stay drug free?

He should say "no" clearly and firmly state that he doesn't do drugs. If they pressure him, he should leave the scene.
He should say "no", but not too aggressively, and take care not to offend them so he can keep them as friends.
He should smoke with them a few times until he is accepted into the group. Once he's their friend he can stop.