The initial assumption would probably be country, but there's plenty of evidence that's not true, I know that the first major music fest in Minnesota after it legalized selling THC edibles and beverages basically everywhere was a country one, and the THC product vendors who set up booths there reported massive sales. And if you think Christian...well you aren't familiar with the Furnace Fest Community, LOL. Nor have you attended and smelled the inside of a venue of a Christian hardcore show.
I'm going to guess maybe jazz? I can't see many people sneaking in pot to a jazz club.
I've never been more certain that a person has no experience whatsoever with jazz, lol.