Similar to Florida teams is my exact concern. Outside the Dolphins and now the Lightning, at least for the time being, no one cares about Florida sports. The Rays are perennial contenders, and it's usually not even close attendance wise between Tampa and whoever comes in at 29th. And it's probable that Miami is in that 29th conversation yearly. The Panthers might as well not exist.
I misunderstood this post and thought you were saying that the Lightning couldn't draw for crap, and I was about to come back with this well-researched rebuttal about how Tampa actually tends to draw rather well, and then I reread it and realized you were talking about baseball instead.
But yeah, the Rays are just pitiful when it comes to attendance. Lately Cleveland has been right down there with them, and the Marlins usually aren't too far off.
I'd be careful about dissing the Panthers, though. Granted, they only drew a little over 11k this past season and a little over 14k the year before that, but typically they're in the same general neighborhood as the Devils; sometimes their attendance is better, sometimes ours is. Here's the last 10 seasons of attendance data (hopefully the formatting comes out right):