Fort Lauderdale!!!!!
I've lived here since'78 and have been a roadie since '86. Clearly no hills but we have some of the best oceanside routes I've experienced. What we lack for not having hills is made up by plenty of sea breeze that will keep you in the drops for half the ride, then turn around and get into big gears for the other, or vice versa. I frequently run into foreigners riding here and am told this is like riding in the Netherlands. Most of our roads have bike lanes and there are plenty of riders of all caliber. Plenty of bike shops too. I like the straight roads because I can see what's coming too, and they can generally see me as well.
Oh, and did I mention that the "Beach Scenery" is next to none? Actually, those spottings are some of the most hazardous (read: distracting) items on a ride, if you go when they're all flocking to the beach.