QB House has SGD 10 haircuts in Singapore. You walk in, put $10 into the vending machine, you get a card, wait in a short queue, you give the stylist your card, and they cut your hair. As in the rest of Singapore, no tipping allowed, so they make their money on throughput.
In terms of automation and hygiene, each haircut station has a vacuum in the floor and another flexible extension for quick snippings removal; and they use irradiation to sterilize their tools, which just adds to the well-lit interior. Their website and the in-house video loop tout their training, so it'll be interesting to see how their performance varies over time.
Can you make a McDonald's of haircuts?