The most popular organizations on campus are the various Greek organizations. Greek life dominates the social scene, and is basically inescapable when looking for something to do on the weekends. There are 13 fraternities and 5 sororities, and generally there is some party going on where one can enjoy themselves. As sororities cannot have houses, fraternity parties tend to define weekends, but Greek life is certainly not as sports- and wealth-centric as it is portrayed either in film or in rumor.
Athletic events tend to draw a lot of attention from about half of the campus, the other half staying astoundingly unaware of anything going on. Despite the influx of alumni for football games, it is remarkably easy to never realize there is a game being played on campus.
Shots in the Dark, the improv comedy club, has been a huge factor in my college career. First semester of my freshman year I lived in a theme house with other upperclassmen from the club, and my role as one of the six regulars in our performance troupe has earned me what reputation I have on campus. I am also heavily involved with the Pan Fried Funk, the ultimate frisbee club, both the coed and men's teams. In a large sense, the Funk has been my family at college, taking me in the second week of my freshman year, when practice started, and giving me a standing invitation at their house. This extends to every member of the club, and every friend of the team. You could say that it is clique-ish, but I find it more to have been a foundation, from which I can branch out and experience the rest of college, while having a large group of friends that I can fall back on. The frisbee players that live in the Funk theme house often go to meals at the dining hall together, prompting people who live on their own to join up with them for meals there, which is a welcome cameraderie in the crowded dining hall.
Dating at Gettysburg is hard to define. Some people date for a few weeks, some people form semester or year-long relationships, and other people seem to just hook up at parties and never speak again. My freshman year was spent in a long-distance relationship, and this seems to be typical, maybe as many as 25{4a082faed443b016e84c6ea63012b481c58f64867aa2dc62fff66e22ad7dff6c} of freshman disinterested in the dating scene.
On a saturday night that doesn't involve drinking, your main option is to hang out with your friends, and hope they don't decide that beer pong is the only thing left to do. If you plan to not drink or party, it would be a good idea to come to Gettysburg already with ideas for things to do alone, or things to do with other people who don't drink. My freshman year, I mostly watched movies with my friends, or played board games. Now, I party a lot more, but it came with the realization that there are fraternities that are worth being around.