Having joined the Church at the age of 36, I have done lots of things not sanctioned by the Church - anything that was legal and a few things that were not.
I follow the WoW because I covenanted to do so, however if I were to leave the Church today, I would probably go back to being a social drinker - I admit I miss it. I use to drink maybe 3 or 4 times a year except I did have a (one) glass of wine with dinner at least a couple times a month.
Coffee - Never - can't stand the taste and never cared for tea.
Smoking - I quit 7 years before joining and would never ever start again
Marijuana - Would be an alternative to pain pills which since I have an issue with chronic pain would be a consideration