NYC Swing?!?!?!

Hey everyone - I was wondering if anyone has seen NYC perform at a wedding. How were they? was the band too loud since there are so many people in it? were people able to talk and sit while others danced?

also, I know there are about 7 bands under the title 'NYC Swing' - can yoy choose any band you want and do you have to have all 11 members at your wedding?

Thanks!