As a "non" smoker, I would occasionally bum one off one of my friends when we meet at the outdoor sit bar down the street. A 3 beer buzz immediately doubles with one cig. Don't think that would work now, since I have a new nicotine lip pillow in every 2 hours I'm awake.
The two giant puffs I took off a communal joint while Cross Canadian Ragweed was singing "them boys from Oklahoma roll their joints all wrong" back in April had the effect of drinking an additional 30 pack.
I don't remember anything like that back in the year 1993, the only other time I've partaken of the weed. Think it's a whole different ballgame now.