The hub of the ship -- and its entertainment options -- is the Centrum, which got a full-on makeover in 2012. Its lowest level is Deck 4, where the R Bar serves up classic martinis in a setting that's supposed to be 1960's mod decor. The bar and additional comfy seating surround a small dance floor and bandstand. That's where all the action takes place, including art auctions, cooking demos, ballroom-dance classes and late-night themed dance parties. The Centrum space soars up to Deck 8 with a windowed ceiling on the pool deck above, and the upper reaches have been outfitted with stage lighting and rigging for aerial acrobatic performances (think high-flying bungee swings). The performances, some of which are publicized in the daily programs and some of which are serendipitous, vary in quality; if you go to only one, make it the farewell spectacular.
The ship has a few main lounges. The Palladium Theatre has excellent sightlines, seating on fixed banquettes and drink holders on armrests. Expect several performances by the ship's singers and dancers, as well as specialty acts. (Think Beatles tribute band, comedian, magic show and performances by aging celebrities.)
The clubby yet whimsical Schooner Bar has floor-to-ceiling glass windows that look onto the outdoor promenade one deck below. There, the floor by the bar is actual teak decking, varnished and polished to a rich, glossy mahogany sheen. Several tables feature ersatz bits of masts and rigging sprouting from them like transformed umbrellas. A piano with singalong seating is there for evening entertainment and trivia game purposes.
The South Pacific Lounge, located at the stern, is the ship's secondary performance venue, but it's strangely off-the-beaten-track, as you must walk through the Schooner Bar to get to it. It plays host to art auctions, bingo games, dance lessons and dancing to live bands, karaoke and various presentations, from future cruise sales to shopping talks.
The most recognizable public room on Grandeur of the Seas is Royal Caribbean's signature Viking Crown Lounge. With the addition of Izumi and the Concierge Lounge in the same space, the area feels less open and more chopped up than before. It's still a lovely spot to watch sailaway from indoors, and it's also the late-night disco venue.
Casino Royale on Deck 5 has slot machines and all the requisite card tables (poker, blackjack, craps, etc.).
On warm-weather itineraries, the pool deck is the place to go for belly-flop competitions, ice-carving demos and a men's sexy legs contest.
On port days, Royal Caribbean offers a vast array of shore excursions. We booked two of them online in advance of our cruise -- a seamless process. On a Bermuda cruise, we did a three-hour bike ride on a hiker-biker trail and a "famous homes & hideaways cruise," both well worth it.