The Bar/Lounge at Great Northern Hotel, A Tribute Portfolio Hotel, London
Great Northern Hotel, A Tribute Portfolio Hotel's bar/lounge is endorsed by professional reviewers. Out of 6 professionals tracked on TripExpert, 8 endorsed the bar/lounge, such as Lonely Planet, Zagat and Frommer's.
Great Northern Hotel, A Tribute Portfolio Hotel, London 
Lonely Planet
Zagat
Frommer's
Jetsetter
Oyster
Star Service Jetsetter Star Service
Lonely Planet "And in addition to the two lively bars and a restaurant, there's a ‘pantry’ on every floor, from which you can help yourself to hot or cold drinks and snacks, including cakes baked daily"
Zagat "Other amenities include a bar, a restaurant serving British cuisine and floor pantries stocked with free goodies"
Frommer's "Other high-standard perks pack the other spaces—a good British restaurant, Plum & Split Milk (named after a color scheme), a top lobby cocktail bar with hidden crannies, and a "Kiosk" facing the train station that makes fantastic salt beef sandwiches, an East End staple brought here for the hipster effect"
Jetsetter "The revitalized King's Cross neighborhood is home to a number of top bars and restaurants"
Oyster "Michelin-star chef Mark Sargeant heads the Plum & Spilt Milk restaurant, and there's a Belle Epoque-style bar, and the more intimate Mezzanine Snug Bar"
Star Service "There's a small, private mezzanine lounge overlooking the bar whose walls are lined with amusing saucy antique Victorian photographs"
Jetsetter "The revitalized King's Cross neighborhood is home to a number of top bars and restaurants"
Star Service "There's a small, private mezzanine lounge overlooking the bar, whose walls are lined with amusing saucy antique Victorian photographs"
