3. Long Island Marriott - It's been right there across the parking lot from the Nassau Mausoleum, from Day 1. Every single hockey player, scout, referee, coach, GM, trainer, whatever has been inside this hotel and, likely, the bar.
My favorite memory: having a diet soda or two with the Hanson Brothers, after an Avs-Islanders game in 1995. There they were, in full Charlestown Chief uniform, after doing an appearance between periods that night.