If you're looking for a modest place where the trainers are competent, and there is basic equipment — check out Fitness Fast in Sindhi Colony. Ideally, personal training is the best offer to avail from here, as that assures the work out is tailored to your fitness needs. It can get a little crowded, however. But, if that's fine by you, it's one of the best budget gyms in the area.
Price: INR 5,000 for three months.