We left a park in Largo, FL last weekend. There was a couple there that was towing a Fiat Convertible. Didn't stop to talk to them as there was a bit of a language challenge (from Quebec). I didn't really look at the car too much other than to notice that it was a Fiat 500 Convertible.
We are currently 4-down towing a 6-speed 2013 Mini Cooper Roadster S. I've seen some convertibles being towed 4-down too as an alternative. I'm guessing that there will be some comments about people not liking the Mini's either but we're on our 3rd and yea, they aren't cheap to fix but the first one we ordered is still on the road 13 years later with over 200K miles.