Soldier on, then change strings between sets. But then, I'm a cheap bastard and only own 3 guitars, not one of them interchangeable with the others . . which, btw, is a horrible and stupid way to do gigs . . .
"The music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs. There's also a negative side." -- HST
Here's a tip:
To avoid embarrasing situations, be careful with Guitar Strings. :)
I do an irish jig usually, you know, ashlee simpson style.
That or #2 or #3 if i was lazy that day.
aka Izabella