I also used the guitarist during the ceremony, I think it was a very nice touch and made it more intimate.
I received a list of songs from guitarist and this is what I chose:
Prelude - guitarist choice
Processional - In My Life
Bride Entrance - What a Wonderful World
Interlude - guitarist choice
recessional - Your The Sunshine of My Life
We brought our own speaker for the cocktail hour at Mix Bar because we were not paying for a speaker, etc.. from them for a crazy amount. Then they had music playing anyways for free. So if you are at Mix Bar there were speakers there already playing music.