Honestly it depends. There are tons of positives and negatives to joining a frat.
The case for: the most important thing about being in a frat is that you genuinely have to like enough people to be friends with them. If you don't get along with people or the other guys you are bidding in with, get out because they are using you to shore up their numbers hoping you'll come around to their way of thinking. If you think there are 3 or 4 guys you'd be friends with, that's my cutoff point for where it becomes worthwhile. Second, networking. Depending on how well the alumni network is setup, you absolutely can cash on this when you get out of school. The frat I was in was run extremely poorly in this regard, but I've heard stories of people cashing in on these connections befote. My only contribution to my career was that my hiring manager in my initial interview was in a frat (not mine) and as a result my paper thin resume of my degree and frat leadership positions are all we talked about. Third, you will absolutely meet more girls as a result of your connection in the fraternity. And no, they are not served up to you drugged up and drunk like some people in this thread would have you believe. Mainly, they will be friends of people in the frat. In this regard, this is how I met my wife. A guy in my frat organized a trip to a baseball game like 3 years after we graduated. He invited someone he knew from high school, and that's where I met my wife for the first time.
The case against: You will have some shady as fuck people around. This weed out process to bid people in does not get everyone. Shady people who push drugs and do questionable sit will exist, the question is how many of them will there be. Second, hazing could be a thing. I experienced it and while it was relatively tame outside of some forced exercise and "forced" house chores, I have heard of places that take it too far and use physical attacks and sexual misconduct in what they do. If that's the case, get out immediately.
The neutral points: "paying for your friends" I always found this to be a joke because it was way more expensive to live in the dorms or an apartment then it was living in a frat house. Even our out of house membership fee was ridiculously cheap for an entire year and got me daily lunch, a parking spot, and plenty of alcohol to cover the cost.
I think your decision is completely dependant on the situation.