"OPEN AIR" BARBER SHOP: It's no trouble getting to a chair at the Dascola Barber Shop at 507 E. Liberty St. these days. The entire front is open. No door to enter, no glass or structural wall to deter the customer. It won't last, however. It's only the first step in a $2,500 front remodeling program. A new glass exterior is being constructed by the Huron Valley Glass Co. of Ypsilanti.