Served cider, ice cream. Mirrors at the end of the bar made it look mile long

From the 1973 Disney University Food Showmanship Disney Style:
Located next to the exit of the Country Bear Jamboree is the longest bar in the world. At least it appears this way at first glance. The Imagineers at WED produced this unique illusion by using a series of mirrors to produce an endless succession of reflections, thus, giving the guests the feeling of standing at a "Mile Long Bar."