It depends on the volume. An increase of only a few decibels has a dramatic effect on the danger to hearing. Each increase of 3 Decibels (dB) represents a doubling of noise energy / sound pressure, and halves the safe exposure time time you should listen for. Human hearing does not work linearly in that an increase of 3 dB does not "sound" twice as loud. The perception of twice as loud corresponds to considerably more than twice the total acoustic power. Typically literature states that 10 dB increase of sound level is heard as "twice as loud". While it may not be exactly 10 dB, that's a reasonable figure.
Example: Being on a dance floor for one hour at 100 dB(A) delivers the same amount of noise energy to the ear (and therefore potential damage) as being on a slightly less noisy dance floor at 97 dB(A) for two hours. Simply put, a small reduction in volume makes a big difference to the length of time you can safely listen without hearing protection. This is why EarPeace provides protection and improves experience. Many live music venues and nightclubs are consistently above 100 dB.
EarPeace extends the length of your experience safely, even if you wear it for short periods of time to rest your ears. Bottom line, if loud music ever causes you pain or discomfort, you should protect yourself and leave / turn it down immediately.