JK Wrangler (4 door Jeep Wrangler). Because it is designed to get dirty and be cleaned via water hose, is a convertible, and you can take the front doors off for you and leave the back ones on for your dog.

Porsche knows how to do business in Atlanta - just lend out a few cars to top ranking city officials: http://www.ajc.com/news/news/local/special-events-director-in-atlanta-mayors-office-r/nRMfM/