Spa Tower Suite (two-night minimum): Have you ever stayed in a two-story hotel room? We find the experience to be one every traveler should seek to conquer - talk about a notch in the belt. Floor-to-ceiling windows and 1,500 square feet of space round out the perks.
Terrace One-Bedroom Fountain View (must stay the 30th and 31st to book the 31st): This room runs a little small to be considered a true suite, but the Cosmo is all about the balconies and this one gives you a fantastic view of the Bellagio fountains.
Salon Suite (two-night minimum): We were going to recommend the Grand Suite (it, too, is still available), but why not save yourself $100 on the 30th or the 1st and go with the Salon Suite? What you sacrifice in size you make up for in rock 'n' roll appeal as the Salon Suite is equipped with a Bose sound system and a Jacuzzi. Party on.
Supreme Corner King Suite (two-night minimum): This one happens to be a suite, but we find corner rooms to be one of the most overlooked upgrade. The two 40" televisions in this room have no chance of competing with the panoramic views.
One Bedroom Balcony Suite (two-night minimum): This beautiful room boasting a balcony has a two-night minimum for New Year's Eve, but you can save mucho dinero if you elect for the 31st and the 1st. Unlike the Hard Rock above, the rate for the 31st changes based on whether you stay the 30th or the 1st. If you go with the Signature, just try to charm or $20 trick your way into an accommodation with a Strip-facing view.
If stay 31th and 1st:
If stay 30th and 31st:
Note: Hotel rates are accurate as of the week of December 13, but can always fluctuate based on demand.
(PHOTOS: The Cosmopolitan on Foursquare, Golden Nugget, The Cosmopolitan, Palms, Hard Rock, MGM Grand)