The Golden State Theater in Monterey had the perfume scent wafting through the air during the Donovan concert. Not marijuana though (thank goodness) I know the theater spokesperson explained about it before concert started and said something about a light scent would be in the air throughout the concert. I can't recall the name of it though. The theater people/management had set it up, not a concertgoer for the purpose of the Donovan concert.
It was very nice - very light scent and not strong or anything.
I don't think it was incense because incense is usually somewhat strong. More like a very light perfume I guess.
I wasn't familiar with the scent so I could not identify it.