I live in a community where about a fourth to half of the population is Jewish and I have many friends here that all seem to have different outlooks about addictive substances. Particularly about alcohol and tobacco. 

The stance seems to range from the Mormon end of abstinence to the other end of the spectrum of usage being fine. Most friends seem to be on the moderation and abstinence side wile sharing  some references that support abstinence or strict moderation. Oddly more affluent friends seem to abstain or maybe only use wine on major holidays.

What's the norm and is there some official Jewish doctrine that controls this?