You can see the suite perks here
. The larger ships have dedicated concierge lounges for those in Grand Suites and above, as well as Diamond Plus and Pinnacle Club members of the Crown & Anchor Society. I've read reports that RCI is considering dropping the perk for suite guests getting anytime access to shows, instead requiring everyone to have a reservation. But the concierge can get reservations as I suspect he/she always has a holdback number of seats. Believe it or not, I've seen people almost start fights because they were jealous of the suite guests getting special seating. We like the perks and try to book a suite on each RCI cruise. The perks do not include Junior Suites.
Excursions usually are not available until 3 months or so out from the cruise.