I don't buy this. At a fast food chain, drinks are $1 with free refills. A burger is $3 for the fancy ones, $1 for the dollar menu ones. The windows also have all sorts of 4 for $4 or $5 value meal deals. So $5 without any coupons at Wendy's. Two people can eat for $6 if you use a coupon.
Ruby Tuesday burgers are $9.50 with fries. Add a soda, tip, tax, and it's $16. The multiple is still 3-4x.