The LAST thing you want to do outside of California is approach a bunch of co-eds on campus, in public with a proposition like this. You open yourself up to all sorts of pimping and pandering violations.
Try Craigslist in the Adult Gigs section, be discrete about it as you don't know what the reaction by your local law enforcement might be. Check out your local strip clubs and test the waters for talent; you might run into a few college girls there which automatically weeds the ones who might be interested versus the ones who would call the cops on you.
Best of luck, but be ready to deal with all the 2257 requirements (including listing a custodian or records, which if you're not willing to pay a lawyer or someone else will probably include your home address for the world to see).