I've got about 4-5 people into weed, none of them are GOOD mates as such, just people i've known for a long time.

One guy used to be so against it i didnt talk to him, but i got him smoking.
Another took 3 tokes on my joint and passed out at a party - but he's got going again.
The drummer of the band i used to be got into it because of me, and so did one of the guitar technicians. [My bass tech never got into it lol!]
My mate jack got into it more heavily than any of the others - me and him still smoke fairly regularly.