Hmm probably about a third of my graduate level QED class and considerably less in my undergraduate QM but you'd be surprised at the cross over between potheads and high level physics.
I don't see any reason that would cause them to be mutually exclusive.
Is this trying to imply that it would be surprising for a pothead to take a quantum mechanics class? Cause, having hung out with plenty of physicists, that wouldn’t surprise me too much... :P
It was an algorithms class. But I'm 100% certain there was at least one ;)
The joke I have heard is that Physics students are either shut-ins or party animals, either way they're both microdosing something or other...
Personally I had grown out of that habit a semester or two before undergrad QM (though "Modern Physics" and "Experimental Physics" were another story...) but there were still some hangers on. Maybe 1-3 in a class of 20-25? Neither the norm nor unheard of. From that point on the statistics were probably about the same in grad school.