The frats at my school don't allow any guys besides the frat bros in them. I got into one once because I brought like 10 girls and it's literally just all the guys by the bar and all the girls in the main area. It's sad.
Yes! I'm in a sorority but the sororities never have parties at their houses, the frats host parties. You don't have to be in a sorority to get into one though because they basically let any girl in, but they don't let guys in unless they're in that frat
They can be kind of sleazy, which is why I don't go to frat parties much
They're a bit of a mess, everyone is just so sloppy. I enjoy the house parties better where at least you know most of the people there, they can have fun but aren't insane or very sleazy.