The music does tend to be similar most every night. It does not ever seem to be "Theme" oriented.
When we were recently there, the music was TERRIBLE ( No Kidding - Kool and the gang and copacabana repeatedly) and from the 70's/early 80's . The group that was there at the time was a much older crowd and I do believe they were trying to cater to that group, but wow ! We would only get some decent modern music to dance to by requesting it. They did play alot of latin music later in the night, but not too many ( read....ME) know how to dance to that.
Some of the larger takeover groups do have alot of input into what the DJ plays that week.
Music, obviously, is very subjective. I never understand though why when a DJ sees a song
CLEAR the dance floor one night, why the hell do they play it again the next night.....and the next night... and the next night ?
Steve