[nauadpi]

It all depends on the campus... every campus has a different reason why groups serenade eachother... At my school it had been to try to get something returned... The sorority or fraternity would "borrow" an item from the chapter room (with permission from the chapter beforehand) and then the sorority or fraternity would sing to get it back... The chapter who "borrowed" the item will sing in response and then you give the item back... It is pretty fun... and groups do actually ask for permission beforehand, so it is all in good fun...