i've seen a a where three barbershops were a stone's throw away from each other, with a few houses between them on a street in an (only moderately dense) residential area with no carparks anywhere nearby, and wondered how that could possibly have arisen (since they'd detract each other's customers, and laundering operations wouldn't make it so blatantly obvious).

and the same occurs with phone(-repair)-and-vape shops in shopping areas (which I guess are somewhat more understandable, since they only require one employee present each and do get footfall, and the cost to rent a shop has imploded since the coronavirus hit the final nail in the town centre's coffin)