The Fitness Center at The Cloud One Hotel Frankfurt-Metropolitan
Steigenberger Hotel Metropolitan's fitness center is referenced by expert writers. Of the 3 publications that we monitored, 2 referenced the fitness center, including Lonely Planet and Star Service.
The Cloud One Hotel Frankfurt-Metropolitan 
Lonely Planet
Star Service
Lonely Planet "There's a sauna and gym (but alas no swimming pool) on the top floor"
Star Service "Recreational facilities are limited to a sauna, gym, steam room and pair of tanning beds"
