Sometimes I play for 50 minutes, then take a 10 minute break, but like montunoman, I've seen me play most nights with only one short break (10 minutes), around the middle of the gig.

Time goes quick when you're having fun.

Ian
_________________________
Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.