Lot of options- try pondicherry for exotic party scenes in white town, Andaman boat cruise party is highly recommended as well. Let me know, if you have something in mind!
There are lot of options. Depends how you want to celebrate New year..
You can go for Andaman (Boat party), Pondicherry( beach party), Kasol( Music fastival)..
The New Year is that time of the year when everybody wants to spend their time with their close ones and loosen up from the year-long stress. India is one of the most traditional and cultural oriented countries, but let me tell you when it comes to partying and having a great time India doesn't hold back in that too! Here are List of best New year Places in India(https://www.mouthshut.com/travel/top-10-best-places-to-celebrate-new-year-in-india-tpg-313)
Manali
Udaipur
Gulmarg
McLeodganj
Pondicherry
Jaisalmer
Gokarna
Andaman
Mumbai