The type of music and the kinds of selections played are entirely up to you. The one caveat is that you must make certain that the musicians you pick are able to play the kind of music you want. This is an area in which hearing is believing. It is wise for you either to watch a live performance or to get a tape of the kinds of selections you want. You will find to your delight that the different kinds of musical groups that are available are growing.
Today there are unlimited options . . .
The size of groups can range from two pieces with perhaps a keyboard synthesizer to a fifteen-piece band. There is also a wide selection of entertainers other than musicians such as vocalists, and dancers. During dinner you will want to plan with your entertainment professionals to have some background music while your guests are eating. There is no single bigger complaint by guests than that the music was so loud, they couldn't hear anyone at the table. It really is best to save music for dancing for after dinner.