Peer pressure does work both ways!
For me though I used to eat badly with my work colleagues so I would fit in, so when they all went for a fry up then I went with them and would eat huge plates just so they talked about me and that I was one of the gang.
Now if I fancy a fry up I'll go, if I don't I won't, and if they don't like me for being me then that's fine as well! I don't need anybody to need me to smoke, drink or eat to be their friend...
M.