Okay, I think this is where I should put this:
As an incoming freshman...if you want to interact with people on your floor...pick a dorm in the MISTLETOE residential community. The names of the dorms are either Pierce (that was mine!), Storrs, or Hitchcock.
Apart from 4th floor hitchcock that is all girls (there's a funny joke that people have. Can you figure it out? The TOP floor of the hitchCOCK dorms is only for girls? Anyways...), these three dorms are co-ed on each floor. In addition of having members of the opposite sex on the same floor, they also have a quad layout and have a common room on each floor. This has some pros and cons, but I'd be willing to say the pros outweigh the cons.
On the plus side, it's WAY easier to meet people (and make very good friends) this way. Many people would simply hang out in the common room either reading, just messing around on the internet with their laptops or simply doing SOMETHING (I know at the beginning of the year we'd play cards a lot). Even if no one is out there...GO OUT THERE! It won't be long before someone else joins you, and then it'll get pretty full before you know it. It's really nice.
The bad thing is that I found Mistletoe to be more "segregated" per floor. That is to say, I became close with my floor, but I knew few people on the floors above mine. This isn't necessarily a bad thing, but it's something to keep in mind.
Every other freshman dorm has boys and girls on every other floor. So The 2nd floor might be all guys, 3rd floor all girls, 4th floor all guys, etc. They also don't have a common room on any floors except a big one on the 1st floor. So the difference is that if you live, say, on the 3rd floor and want to interact with people you're going to have to either simply walk into someone else's room or walk down to the lobby and hang out in that big common room. It's not like the people living in these dorms don't make friends (that would be ridiculous to say!) but I think Mistletoe dorms make it easier to interact with people. I'm very glad I made the choice to live in Pierce. Oh, and we're right next door to the cafeteria ;)
As for dating: it's certainly possible if you want to, but it's more common to simply "hook up" at or after a party. But if you want to date, you shouldn't have trouble finding someone.
All of my closest friends were from my freshman dorm, but I am also friends with some people in some of my other classes. I know people who've made friends at the library too. Just gotta meet people! And usually, you'll be better friends with people you're around often. So of course that sort of leads to the dorms...
As for the party scene: it's there. There aren't parties EVERY weekend (no idea why but whatever) but they aren't rare. Most of them are simply "okay" and get the job done but aren't like in the movies...but every so often there will be a gigantic party with 15 kegs and whatnot. Pretty ridiculous and awesome.
But don't come here for the parties. If you're that kind of person, Case will be miserable for you. But if you do like to party every so often, then I think you'll have fun. Of course, if you don't want to party at all then that's also fine. There are plenty of people here who don't drink, and you won't feel weird. Personally, I didn't drink much at all in high school but I tried it out and I find it fun. It's up to you.
Greek life is relatively prominent at Case. If you want to go greek, you'll be able to pretty easily. And if not, that's perfectly fine too. I have 3 friends who are in fraternities and they like it. I personally wouldn't like to put in the time that they put in, but if you like it then that's cool.
As a freshman, you're going to hear a lot of people talking about transferring near the end of the first semester. Most of them are just whining about all the workload. Yeah, it's tough...but the time you put in will pay off later. Yeah, I would probably having more fun at a state school (plane honest truth), but Case offers more than state schools when it doesn't come to parties. And it's not like I'm depressed here at Case: few people are. Yeah, it could be better, but I'm fine and satisfied as-is.