I spent a significant amount of time in and around College Park and will now describe the most important pieces of information with regards to the bars there. Keep in mind, I walked away from the crown jewel of PG County eight years ago so some of myinformation could be out of date.
First, don't bother with the bars on Gameday. Tailgate in the cash lots. But if you want to see the scene, spend either Friday or Saturday night at the bars.
There are three bars in CP - Santa Fe, Cornerstone, and RJ Bentleys. Each bar seems to attract a certain clientele with certain attributes, and armed with this knowledge, a well-prepared swordsman can wreak a spectacular amount of human carnage. I flatter myself that I have carved such a swath.
Bentleys - easiest place for straight up sex. The girls who go here drink hard and on any night, 20% of the femalte population can be convinced into the sack. You will have to stay until the end, you and she will be utterly hammered, and you will have to spend some time observing at the outset, as the prime targets are mixed in among dozens of hapless decoys. The first time I went home with a girl from Bentleys, she puked on me during coitus. We kept going.
Cornerstone - highest percentage here. The girls are generally wealthier, nicer-dressed, more put-together, and massively more irritating (issues, not Issues). You will have a high percentage shot here, but the flip side is that you must listen to a few hours of unbelievably banal banter about her friends, her friends' cars, her parent issues, her mother's surgery, etc. You're thinking, no problem, if I know I'm getting laid I can deal with anything... in fact, an evening with a girl from Cornerstone is not unlike when pirates marooned captured sailors who wouldnt sign the articles of piracy with a single pistol shot on a desert island... after a while of enduring whatever woman you sit next to, that right hand starts to look pretty good...
Many Chapter 7s have their beginnings at Cornerstone.
Santa Fe - most chill place, best food, least likely to get laid. If there's such a thing as an ideal BC girl (smart, hot, athletic, fun), UMD's version of her comes here. Low shot at getting laid but if you have meticulous and exacting standards when it comes to women, this place is the likeliest to appeal to your sensibilities.
It also used to have a girl with ridiculous Keely Hazell cans waitressing - crowrds of men would show up to watch her do her thing, not unlike tour groups arriving at the pyramids.
En garde, swordsmen!
EDIT :: if anyone is going out in DC, I'll post recommendations for there. It's been seven/eight years... but some of the information may still hold true.