The W is reminiscent of your early aughts in New York City. You probably sipped your first martini there and thought you were very downtown. And you probably didn’t think it would make your “must” list a quarter of a century later, but here we are. After a $100 million makeover, the OG of cool is back, and sharper than ever. The Original “It” Hotel When W New York – Union Square first opened in 2000, it basically invented the…