The problem with uniform is misinterpretation. A lot of folkie uniform comes from function. Tankards prevent confusion of ownership or removal before empty, they don't break easily. Dance sides are in context. Sure there is a lot of similarity in folkie garb, but best suits in a tent and mud are hardly practical. Flowing skirts suit festival weather, jeans are work-a-day washable clothes. The uniform comes out of the context. Has anyone been to a gypsy horse fair? I think "uniform" would scream out at you. I was a culture shock to me.
Half the pubs and shops shut down during Stow Fair week too!