Mo and Tom -
I am also booked on the Oct 29 (back to back with the Nov 11 cruise to Ft Lauderdale). I have not yet been on Serenity but have been on Symphony and Harmony several times. On those ships, the fitness center opened pretty early (but didn't get a huge turnout at that time). You can get breakfast at the Lido and sit out on the deck but don't know what time it opens (I'm one of those spoiled "bring it to me in my cabin" types!

).
Feel free to email me if I can help in any way.
Marga