Modern Gym near Dum Dum (Calcutta)

Hello. I am staying near Dum Dum cantonement for the next 2 months. I would like to find a modern gym to use (on the weekends mostly). I am an expat in my 30s and a woman so I would like somewhere I would be comfortable (ie - not the only lady!). Any suggestions? I do not have a car/scooter so somewhere I can reach easily with public transport (or a cheap taxi) would be best.

Thank you for any suggestions!