A note about other service industry deals on Groupon: I've read somewhere of people buying discount coupons for services like haircuts or aesthetics, only to f

A note about other service industry deals on Groupon: I've read somewhere of people buying discount coupons for services like haircuts or aesthetics, only to find that when they call for an appointment, couponers have longer waits than non-couponers for scheduling. That alone makes me uneasy.