I watched a band this week where the guitarist and drummer noodled full vilume like they were in Guitar Center for 15 minutes after the appointed start time. Am I the only one that thinks this is unbearably amateurish. On a job, i get my sound settings in under 30 seconds. Not a sound further comes from my instrument until the first song. No noodling between numbers. At jam sessions, I might make some groove or play along with the house sound at low volume. Or mimic what the guitarist plays.