The Fitness Center at InterContinental Athenee Palace Bucharest, an IHG Hotel
The fitness center at Athenee Palace Hilton Bucharest is endorsed by those who travel for a living. Out of 4 professionals tracked on TripExpert, 2 referenced the fitness center, such as DK Eyewitness and Rough Guide.
InterContinental Athenee Palace Bucharest, an IHG Hotel 
DK Eyewitness
Rough Guide
DK Eyewitness "Facilities include a sauna, gym and basement pool"
Rough Guide "Despite
some stiff competition, this remains the city’s most
opulent and best-serviced hotel, with sumptuous
rooms (doubles €250) and first-rate facilities,
including sauna, gym and a gorgeous basement
pool"
