That's a good idea. I could try to advertise it that way, since I'm having major issues finding a single person at my college interested in effective altruism. I might be wrong, but do you think it would be harder to get people interested in rationality, or to get them interested in effective altruism? My priors tell me that charity > rationalism in many people's minds, but I'm not sure.

EDIT: I decided to go with the rationality club idea. There's no real advantage in my original plan compared to opening a THINK club, which is basically the same idea except I can do more fun things with it. Thanks for the advice!