When singing in a cabaret/night club type of setting, will the audience usually prefer a slower, more soulful song, or an upbeat rock-opera-esque number? I'm performing in a cabaret at a club near me relatively soon and trying to decide between two songs. Both are well within range and I can do them well, I just can't choose.
I guess it depends on the mood of the club and where you are in the program. I'd say if it's an intimate club and you have a nice spot in the program go for the soulful song.
Having sat through a LOT of cabarets I'd opt for the uptempo.... simply because (I assume) there will be a lot of songs that night and most people tend to choose the ballad. A night full of ballads - even if they're really well done - gets old fast. A well-done uptempo will always be received well. Have fun and break a leg!