What else to call'em? I'm trying to think of these guys that have been part of a big band, and never really did a damn thing. Except dance, look good, bop the lead singer.
I came up with Bez with Happy Mondays (I read about this guy's car that he bought from doing a TV show. With 8 TVs and 20 speakers etc LOL)
Andrew Ridgeley with Wham! Biggest waste of space ever to grace a stage.
Joel Gion with Brian Jonestown Massacre. Probably the coolest (and gayest) tambourine player ever.
Frank Rutherford form Frankie Goes to Hollywood.

"...no longer shall you trudge 'cross my peaceful mind."

Mickey Finn from T.Rex

Nico from V.U? :p

Nah, Lou could never sing those songs as well as Nico did (and he's tried).

Nico also went on to prove herself as an artist in her own right.

...and yes GD, Sweet Lou has never been able to do those songs justice.

How about Cressa from Stone Roses (the poor man's Bez)?

Didn't the laughable Steve Miller Band have a dancer when SM grew too fat to dance anymore?