Pune for a week

Hi folks! I am planning a week long trip to Mumbai in July. Please suggest some places to visit.

Where should I go for night life/parties or clubbing?

Is it a wise decision to go to Lonavala/Mahabaleshwar/Marethan at this time?

Also if you could suggest some offbeat or less crowded hill stations/ beaches nearby.

Also where should I stay in Pune?