Awesome idea. I am actually moving to boston this July. I will definitely check that out. I always thought hackathons were programmers hacking out a MVP in 24/48 hrs etc and I wouldn't have anything to contribute.
Each hackathon is different. Often there are industry experts, etc. Its probably better if you have a partner who can code going into it, but at the Hacking Medicine event there was a pitch time where people could share ideas and try to get a team together.