Personally for me…any city. However I am an ol country boy. Nashville is plagued by the same problems as Houston, Dallas, Charlotte, Raleigh, Atlanta, LA… etc. There is too much of a mixture in culture and road manners. I-95 is a perfect example. Most drivers will hover around 10+ the speed limit..then you get blazed by from a car and I can guarantee you it has one of a few license plates on it, Jersey, Florida, or NY. Here in NC I hear all the time how us country bumkins can’t drive in the snow , yet it’s the northern car thats in the ditch. Most transplants assume the winters here are the same as up there. We get some snow..a lot of ice on top of the snow, apparently not the same up there. Also another thing against a beginner in the city is, there’s more to look at then YOU. Billboards, the hottie beside them, the self proclaimed hottie they see in the shop window that’s their reflection, signs, lights, you name it. Theres a site thats been linked on BBM that even though I absolutely hate the fact it found its way here show some pretty graphic accidents involving motorcycles, if you notice very few of those are outside city limits.
If you can get your bike and find the most relaxed route to the country side and get your practice there.