Okay, this seems to be just a normal 80s Pizza Hut commerical, featuring the comedy stylings of Rich Hall, until you get to the end:
The Park slapped coupons on everything for awhile. I also worked at the local supermarket, and would often witness people stopping in on the way to the park to steal coupons off Coke bottles. Come on people, 2-liter bottles were usually on sale for $0.99. Couldn't you just buy the bottle?