What are some creative partnership ideas?

I'm running an event aggregator web app, and I'd like to pick your brain on what creative partnerships I can pursue? I acknowledge the fact that partnerships are important for growth, for example a friend built an email analytics platform that could take email addresses and gather social statistics, i.e. what platforms they're using etc... And he partnered with MailChimp, UnBounce etc... and it turned out to be a massive success. I'm having some trouble thinking of creative partnerships in the event space. I've got the database populated with venues etc... but who can I partner with to grow the business? Open to fresh ideas. Thanks!!!!