We were doing this gig with a different, although quite seasoned drummer. We are playing songs that he and I both have played too many times to worry about. All is well. Then the lead-singer-lead-guitar-guy loses the beat. He doesn't hear that he is out. He plows on regardless and he is off by one. It is painfully obvious. What to do? Do I slip the time to sync up with him? Otherwise it will sound like crap for the next five minutes. (I promise the guitar is clueless - he thinks it sounds great.) Or, do I hang with the drummer and plow on relentlessly? Because he is either also clueless or decides to plow the field as it is, and lie there playing the beat that is correct while the lead guitar singer guy stomps all over the tune? What is the protocol? As it turned out I slipped the beat, joined up with the out-of-sync guitar, and the drummer gave me dirty looks for the rest of the night. Okay, so maybe we should have had a chat.