You have to go where successful artistes are. One of such places is a PRO, performance rights organisation. They usually have events and platform for collaboration, at least ASCAP does. you'd have to be a member though. Here's the link to the annual event and the ASCAP Collaborator's Corner: http://www.ascap.com/expo and http://www.ascap.com/collaborator/. Go for maximum success. Good luck.