The Bar/Lounge at Claridge Hotel
Claridge Hotel's bar/lounge is acknowledged by expert reviewers. Out of 5 professionals that we tracked, 3 recommended the bar/lounge, like Fodor's, Time Out and Oyster.
Claridge Hotel 
Fodor's
Time Out
Oyster
Fodor's "Tall white columns and stately bow windows flank the entrance of the Claridge Hotel, beyond which you'll find the high-ceilinged lobby and a traditional British café and piano bar that draws a steady stream of politicians and businessmen"
Time Out "The grand Greco-columned entrance leads into the lobby; beyond is a mock-Tudor bar and restaurant"
Oyster "Hotel amenities include a seasonal outdoor pool, a spacious gym, and cozy restaurant and bar"
