With the ESN Card you can get discounted membership at the Big One Fitness gym. The membership includes entrance to both gym locations:

  •  Big One Fitness Club which offers a gym, wellness and group lessons,
  •  Big One Fitness at Václavská which offers a gym and group lessons.

 

The normal price for this membership is 1,900 CZK but you can get yours with the ESN Card for just 1,150 CZK per month.

Website: 
https://www.big1fitness.cz/en/