Re: aikido clubs on-campus
You could also look to the professors in the university. Right now we've got 2 profs (A Shodan and a Nidan) and a couple researchers (one of with is our Sensei). We've also got a lawyer, teachers, and a few others who work in the city.
Basically, advertise and promote outside the university as well as within, and don't limit the university to just the students.
I've personally found Aikido is a good way to blow off steam, and during exam weeks that's a very valuable thing.