Re: Is it fair to play live with a metronome?
I think there are a few challenges involved in playing to a click. Two of the bands I play in have sequencers as well, often with 16 or more bars of silence in the middle of the track, so it's imperative I play to a click. The challenge is making your parts groove to a click, playing around the beat subtly, but still holding it together.
You've also got to make sure your internal clock is strong without a metronome as well, I often do exercises with 8 bars with a click, then 8 bars with it muted on loop, to make sure i'm in check.
I read Vinnie Colaiuta say "Make the metronome your friend, not your enemy" I never looked back.
Because I play live to a click so often, I only notice the click in my headphones when i'm out of time, which makes my studio playing so much more comfortable.
So to answer your question, yes it is fair to play live to a click.