Let's see. What does a good Jam location need?
A Jam needs a physical location, organised by the host, where the Jam takes place. It might be an office, university, sports hall, appartment, boat, tent or taxicab. It will need enough space to host the Jam, sufficient heat, light, power, connectivity, some physical comforts and toilets. It would be good if food were available nearby - from a supermarket, restaurant or pizza guy, or even organised by the host. It will need to be accessible (or partly accessible) for the whole 48 hours* - the Jam is a global event, and the buzz goes round the clock.