Tom--Regarding Esmeralda, it has always been a function of who else is staying in the building you are in. My suggestion is that you contact the resort and see if they can give you any instruction as to which building you are in and what the other occupants might want.

As far as Club O and chairs, for days when there are a bunch of ships in (check out the Cruise Schedule here), I would try to get there early. For days when little or no ships in and for the weekends, 10:30 or so should be fine..