This NEEDS to have a post count beside the categories while the site is still new and largely empty. As soon as I clicked into the first empty category I left

This NEEDS to have a post count beside the categories while the site is still new and largely empty. As soon as I clicked into the first empty category I left the site, of course. It's silly to expect a user to click around looking for things when there isn't anything - that will just piss people off. I would also add a "We're just getting started, post your stuff!" message in each city and each empty page, to explain to new users what's happening.