Depends on the date and time.
Pre-college and early Army no drinking or drugs...I had my first beer when I was twenty.
My drinking has always been directly correlated with my dating. In college undergrad I was drinking two to three nights a week and going to clubs.
In law school it was once a week drinking until I got serious with Shelagh and then I stopped almost completely, in the five years we were together we drank three times.
After the divorce, twice a week drinking for clubbing until about 2006 when I stopped clubbing; After that I drank primarily when my girlfriends wanted to drink.
These days, once or twice a month I'll get together with my best friend at the local dive bar on a Thursday or Friday afternoon and catch up on life. Alcohol has been my only recreational drug of choice; I haven't even tried pot.