The good people at Nirmukta, a freethought group in India, have been organizing meetups for Indian atheists in cities like Bangalore, Pune, and Mumbai. This month, they’ll be holding meetings in Delhi and Chennai.
If you’re able to attend, all the information can be found here.
If you can’t attend but live in the country, consider checking out IndianAtheists.com and their Facebook page which has information on future meetups.