How many days u have planned for di trp if u planned for Delhi from Delhi u can go Manali or Shimla by bike it's amazing route u can enjoy di ride and snow fall next month December or if u planned for Mumbai u can to lonavala thr s an theme park imagica thr r tow thm parks for 1 thm park u have to spend 1 day after that u planned to mumbai u can enjoy it what's my suggestion s better u can plan to Delhi Shimla Manali it's amazing ..... I have travelled mumbai 5 time's in roads way by bike and car from Chennai...
Mumbai would be great. You can feel the extreme ends if you know the places. If you want to give a shot at Trekking please find this place some 20-30kms from Panvel called Kalavantin Durg. It's a camping spot. The scenic beauty of evening here is just awesome. Now if you wish for night life then there is Marine Drive. It's quite refreshing if you are taking a break from hectic work.