I've been house bassist a few times over the years, those that rock up without a bass better be able to play upright or five string as I've not got anything else to lend them.
If you are only putting up with the downsides of gigging to keep other bands members happy it's time to move on.
If the diary is already fuller than you'd like I can tell you from experience that the more gigs you do for free the more free gigs you'll pick up and it will snowball until you crack, you then look like the bad guy because you won't play the little festival for the donkey sanctuary!
Had a practice in a new wedding venue yesterday, I honestly think without our ampless in ear setup you'd potentially have to cancel the gig in there!
Awful echo, Little drumkit sounded like it was micd up at Knebworth.
I think my reputation for not playing any gigs for free has finally got around everyone that knows me, I used to get asked loads but haven't for a while now.
All that exposure and opportunity missed, ah well.
As my feedback on this site (and eBay for that matter) shows I'm still an old fashioned gentleman, if I say I'll buy it or sell it then that's what I do.