Last night I allowed a couple of ringers to take over singing for a few songs. It's not the first time, but I'm always a little surprised at how much this seems to affect my playing. It's almost like I lose interest a little bit - even during the improvisation.
Perhaps I just need to be the center-of-attention - otherwise I sulk a little bit. Or perhaps I don't want to take the spotlight away from their time in the Sun. I don't know, but I swear that as soon as my guest vocalist(s) sit back down, my playing improves 3-fold.
Kevin