Florida Keys FBOs?

[BayAreaLondoner]

I will be on holiday in the Florida Keys in early June. I wanted to get some flying in whilst down there (with an instructor) in a C172 or other four seater. All I'd really want to do is to go up and fly around the area for sightseeing purposes.
Can anyone recommend FBOs either at Key West or Marathon airports?

Thanks,

David.