I've done plenty of research, I assure you. You would NOT want to be on the road as I attempt to drive home from a most enjoyable moment of smoking pot. 
Need I remind you of the old "smoking" vs "non-smoking" sections in restaurants, on airplanes, in bars? No one seemed able to contain the smoke.
For those who want to make a social event of it, have a good old-fashioned pot party at home.