As someone who attended college in Oklahoma and partook in Greek Life, I can assure you that Okie frat boys are some fucking odd ducks. The OSU frats generally had good parties but there was an issue with one of them having a couple guys get AP from butt chugging so yeah... they're fucking weird. The OU frat boys were the type to talk all the shit in the world and then get completely manhandled by some random high school wrestler a la the viral bathroom fight video. That's like an every weekend occurrence.
My frat was cool as fuck. 90% laid back dudes with jacked up trucks and land to throw ragers on. Best part--we have a chapter at UT so we'd make a couple trips a year to party with those guys. As a Texas kid residing in Oklahoma at the time, it was always a fucking blast to see my buddies' faces when they rolled into Austin for the first time and finally realized just how shitty even the nicest parts of OKC are.
Good times. CSB and all that.