I don't know near hotels in vascod Gama...But if you are coming in this December..you had better to stay near to Calangute , Baga, vagator , arambol for night party
Why don't you try in Airbnb? it's better.. Get some direct contacts through Airbnb and call them outside the Airbnb. I think you will be able to get it cheaper! and try to stay near Tito's or Baga! That's more helpful for your travel as well as time!