I would say to stick with what you think is funny. Even if most women don't get the joke, look for the one who does. Being able to share a joke with a girl is one of the first steps in building rapport.
And if you're a natural at giving speeches, you would clean up even better with women at a Toastmaster's meeting. People who are good at anything should still want to get better.
Maybe there are student clubs you can join that don't cost anything. One more suggestion - women love animals. Any charity or cause that relates to them will be mostly women. I've said this on here before - stand in a public place with a cute puppy or kitten that you are trying to adopt out for a shelter and then tell me you can't talk to girls.