Rajmachi would be nice as it is winter and some pink cold weather. it can be done as a trek starting from the foothills or you can use the gypsys till rajmachi village on the top. campfires and star gazing can be done.
It completely depends what exactly are you looking for. If you're looking for treks you're at the right place, you would find forts with varying difficulty levels. Some of the well known forts are Sinhgad, Lohgad, Rajgad, Vishapur, Torna. Apart from that If you just want to enjoy your evening plan a visit for Lavasa city, Lonavala Tiger point. If you're looking for a historical place go for Aga Khan Palace, Shaniwar Wada & National War Memorial . Spare some time to visit Osho Garden Seven wonders dream park & Empress botanical garden too. Hope that helps😉
A.Inside City - 1. For nature lovers - Sinhgad, Parvati Hills, Khadakwasla, Malhargad, Osho Garden 2. For City Explorers - Museums, Aga Khan Palace, Shanivaarwada, ISKCON, MG and FC Street Market B. Away from City - 1. Nature lovers - Matheran, Panchgani 2. City Explorers - Lonavala, Mahabaleshwar
Sinhagad is a must do. it is only 23 kms from pune and a beautiful place to trek and explore. you need anywhere from 2-4 hrs depending on how much time you spend enjoying the scenic beauty and how much you decide to explore.