A
Great Parties, Great Standard of Living
Greeks make their presence known to freshmen during NSO through their parties. From that point onwards, many of the finest men and women have their hearts set on rushing. These parties are essentially the core of the Penn nightlife, and most parties are pretty decent or better.
A factor though, is that for men, frequently a ratio is enforced, generally a 2 girls : 1 guy ratio. So it really helps to have a lot of girl friends when you do go out.
Greek Housing on the other hand, is a major part of campus life, but it varies wildly in quality from one frat to another. Some of the frats are housed in notable buildings on campus, while others are housed "on-campus" but a few blocks away from the center. Again, most frats have pretty decent houses, but some have phenomenal ones.