They are actually an orchestra of musicians that they pull from in order to get you a 3-4-or5 piece band. They are amazingly talented and have a really good classical/Jazz selection. They are at least half the price of a traditional band but well worth it if you are trying to save some money and cant afford a band. The only negative is that because they aren't a "true" band, they dont play together all the time with the exact 5 people that may show up for you wedding. Also, because they aren't a "true" band, they dont really have a lit of songs that they typically play so if you're picky about wanting to know every single song they will play or give them a playlist, then this isnt for you. However, they were really sooooo great and they even have a singer you can request who sounds jsut like Frank Sinatra! Just let them play their own songs and you dont worry about anything else. Just expect good, solid, jazz musica for a night of dancing!