The Bar/Lounge at LondonHouse Chicago, Curio Collection by Hilton

"The second-floor lobby is enormous and a fabulous place to relax (the armchairs that curve over your head are particularly cool), while the lobby bar has floor-to-ceiling windows that light up the entire space"

"But if you happen to catch it unoccupied, purchase a glass of Dom Perignon champagne and let the bartender know you're interested in enjoying a half hour in the space"