I used to notice this in shops too, as a teenager. We had a sort alternative mini shopping zone, like a slightly upscale indoor market. As soon as me and a coup

I used to notice this in shops too, as a teenager. We had a sort alternative mini shopping zone, like a slightly upscale indoor market. As soon as me and a couple of guys went into any empty stall, within a couple of minutes other people would crowd in too. We'd then pick somewhere else and watch the same thing happen. Always amused us.