Goa is the party city of our country. It is the best I know you could go with your friends. Due to the foreign rule you can see some western culture over there.
A trip of one week can cover all of Goa. Nice hotels are present to stay there. You can see Arabian Sea in certain places where there are mankind beaches, filled with white sand and nice pub to hang out. Various water games are also situated there. I would recommend it go with your buddies.