To answer a couple of your questions.
The singers, who i think do an amazing job, have a music stand each in front of them, you may see the eyes dart down every now and again. Also they get mp3's during the week and get together on Saturday mornings to go through the harmony's. They sing them for the first time with us as we rehearse. Incredible stuff.
The pro dancers choose the music but of course like everything to do with the show it has to be signed off by the production team.
I did love playing the Tango music last week, although when i came to hear it on Sunday the accordion was very quite.
One of the great things about SCD is we get to play so many different styles of music.
Dave, the MD, does hand pick all the musicians and does all the arrangements, when his finished he sends them to a copyist who turns the scores into the parts we get on the stands on Saturday.
We have a core band of 3 Trumpets, 2 Bones, 3 Saxes, Perc, Kit, 2 Guitars, Bass, Pno, keyboards, 4 Singers and of course Dave Arch. We also have a couple of floating chairs for when strings, harmonica, accordion or any other kind of instrument is called for. A big band in the traditional sense, 5 Trumpets, 4 bones, 5 Saxes and 4 rhythm would not be able to cope with the different style of music. But when it's big band time the floating chairs comes into play, extra Brass and woodwind etc. Dave has to arrange everything to work with the set up we have that week. (I love a swing shuffle, best groove known to man)
I would like to add, we are very much a band, we have been playing together for years now on all kind of studios, tv and live gigs, in one form or another. I am very proud of being a sesstion/studio musician.
Thanks for your support it really does make it worth while.