The mile long bar wasn't a bar as in serving drinks. It's got it's name because of mirrors at each end of the counter making it look like a "mile long". Pepsi was the original sponser of the Country Bears, and the bar is where peco's serving area is now. Peco's used to be a lot smaller with only outdoor seating. Above the bar, there were Max, Melvin, and Buff carrying on from the show.
Sometime in the late early 80's is when coke got it's contract with Disney to be it's sole provider of drinks. Up until that time Coke and Pepsi products were served on site.