[quote=@Fabricant451]
My idea was for a siren that was a singer of some sort, be it a lounge singer or something that draws a bit more of a crowd. 
[/quote]

They could totes be a band, but that would require some modification to either of our ideas, so maybe not. Either way, they could easily sort of run in the same circles. 

It could be a running gag that he wants them to work together, but they just really aren't into the same kind of music.