Elephant Sound is the DJ company owned by Dj Bob. He is awesome, both as a person and as a DJ. I have used him for fraternity parties and formals and he has also done a wide spectrum of events for all ages. He did the Class of 1980's Banquet Dinner at the Cornell Reunion this past summer.
I have nothing bad to say about DJ Bob. He hires good DJ's who are very accommodating and listen to what you want to play. They will follow your instructions and are very good.
Prices are very very fair. I would highly recommend using Elephant Sound whether it is a party or a more formal function.