My startup is working on this.

We are kinda-sorta meetup based, to the extent that we want people to get out of their houses and be active in their local communities, be it hiking, going to local venues, or hanging out at local parks.

I'm writing this comment in-between writing the code to help this very problem.

Anyone in the Seattle area who is interested in helping (early stage startup, boot strapped, app and back-end nearing completion) shoot me a message.