Do you mean, pools that are open to the public? There are a couple, but you’ve got to pay some money. And I’ve got a website for each. Here are some:
The Ista Hotel

An apartment called the Tulip

There’s a swimming pool set near Ulsoor Lake, here’s the website:

I’ve found a website that can assist you in finding hotels with swimming pools. Here it is:

The Kensington Swimming Pool , it’s near the Ulsoor Lake.

This is about it, you can find more on that website I gave you about hotels. It’s the last.
I hope I helped!