Firstly, an hours flying lesson is not just an hour. You'll have preflight briefings and you'll be expected to check the plane and stuff. After landing if you don't have a formal debrief you're going to want to have a chat to your instructor about what you've done and what to read up on next. That's not taking in to consideration travelling to and from the place of training. Example, my last lesson was at 13:30, I'm fortunate to live 10 mins from Southend airport, so I left home at 12:45 and got back in at 15:30. True that involved some chatting and not a lot of rushing about on my part but if you're planning on turning up and leaving just over an hour later then you'll not only be disappointed but I think you'll find it difficult to learn.
When abgd mentions intensive training, I think the reference is to learning in blocks rather than longer individual lessons. For instance, it is possible to take a four week course in Florida where you live and breath flying. The weather makes that set up more difficult in the uk. No need to go into that as a search of the forum will give you more details if that suits your personal time and money situation.
One thing is certain is that in th beginning, you'll be hard pushed to do 2-3 hours at once as it's mentally exhausting and I feel it would be counter productive to your learning. As you progress, having two lessons in one day with a break in between can be worth considering.
