All around China you will find the pink lighted barbershops (BBS). Also Beijing has a lot, but you will not find them on the main street, because this kind of shops will not provide hair cut, but some special service. When you pass by, you will see some attractive girls (most time in sexy dresses) sitting around, but never anyone will be busy with haircut. Traditional they have also pink light in the shop, but now a lot of them changed to normal light to hide their kind of service a little bit.
They are cheap