The solution is a one-on-one Meetup.com-style service. You post an event based on subject matter and see who joins. If more than one person is interested, you c

The solution is a one-on-one Meetup.com-style service. You post an event based on subject matter and see who joins. If more than one person is interested, you can make it a small group activity or you can decide to meet each one individually, to foster the potential friendship. You can even provide your (free-time) schedule for the other person to mark a suggested time to hang out.