To truly set yourself apart at your next big party why not hire a singer to go and perform throughout the party. They can have their own background music or they may just sing without any accompaniment. It is whatever you decide to bring in to help liven up the party and make it more fun.
If going on a romantic evening it may be a good idea to hire someone to come and play music for you while you are enjoying your dinner. They will help in setting the mood and will create an atmosphere of your choosing since you will tell them what you would like played.