Do you mean whether or not they will have parties as a part of their regular opening hours, or if certain clubs will be closed for private parties?
Usually on the 4th they do not have parties. In the past there has been a "guest band" and a "street party" with street entertainment (stilt walkers, bead throwing, actors playing characters, etc), and they have an expanded fireworks show at midnight. Now that they have done away with the fireworks altogether and the stages are probably not going to be there much longer, there's no telling what will be happening July 4th until Disney announces something.