This took me a while to figure out, so I figured I'd write down my solution in case someone else is trying to do the same thing.

I'm using the Geocoder gem for Townstage, and when testing locally, it can't geocode my location because my ip address is localhost: 127.0.0.1.

I'd much prefer to hard code the ip address so when testing locally, it thinks I'm always in, say, Ann Arbor. Here's how I did it:

class Rack::Request
  def ip
    '98.209.117.83'
  end
end

Voila!