There are three Hilton hotels in Bangalore, all reasonable.
I know that isn't the cool, off beat way to stay in India, but on business I always stick with the known until business is over and I can take a few days to enjoy the country.
Trip Advisor has some intel:
https://www.tripadvisor.com/SmartDeals-g297628-Bengaluru_Bangalore_District_Karnataka-Hotel-Deals.html
Have fun.
India is a country I will return to.