There are a lot of clubs on campus, and there is a day every year where they all line Campus Walk so students can come by and sign-up. They could be anything from club soccer to the Women of Color, are all student run, and can apply for some money from the school (say $500 a year if you're lucky and a larger club). Sport wise we have some very good sports teams (Men's and Women's Tennis, Rowing, ect.) that are nationally ranked every year. Many people attend the basketball games of both sexes, as well as the soccer and to a lesser extent lacrosse. There is a wonderful, new tennis complex with 6 indoor courts and 12 outdoor courts. And though our tennis teams, specifically the women's, have been ranked in the top 20 for the last 2 years (this year we were 6 and made it to the Elite 8), they have very few fans outside family. This is the case with many of our teams outside the big three.
In addition, the administration got rid of our Rowing Teams at the beginning of this year, though we finished the previous season ranked #7 in the nation. The problem was legitimate (loss of their training waters), but the bigger issue was that the administration made almost no attempt to reconcile the problem until a wealthy relative of one of the players stepped in. They were completely content to simply get rid of a program that was not as "popular" as say basketball, regardless of how hard the players worked and how much better they were on a national level (our Men's Basketball Team struggles to make the tournament each year). And as i mentioned before, though basketball is pretty popular, there are only two sets of bleachers in the gym (on one side), and no football or other team to rally around.
The biggest activity among the students is drinking. Not to say that this isn't the case all around the country, but on Friday/Saturday nights a good portion of the student body regardless of class, is at one of the sporting houses or other upperclass houses drinking. And of course the cops come around about an hour and a half into the party to break it up anyway. And drinking is not simply reserved to the weekends, as the sports players in my hall were obserdly intoxicated on at least 2 weekdays every week as well. Though i was a Junior living with an RA, they were all freshmen. This may not bother you, which is fine, but the housing situation will.
This year there are over 150 students who don't have housing yet for next fall (4,000 students go to Mary Wash, though a great deal of them live off campus), and will probably have the same fate as the students in their situation this past year, who were placed in a hotel until Residents Life 'forced triples' (putting three people in a room designed for two, which by the way are already "cozy" to begin with"). Registration of housing is much worse than for classes, and the dorms themselves are old and many have 'roach' problems.