One who studies "recreational activities" and the enjoyment experienced by people. Either first hand activity or by studying as others do so.
Courtney is a Recreational enjoyment anthropologist as she is the one studying her friends doing shrooms. During her studies she sits and laughs at their misfortunes.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.