I was a little confused at first, but I wonder if it’s because the party size at Disney is likely to be much larger than the party size at my local grocery. At my grocery, there is just a line about 1” x 24”, spaced six feet apart, and you stand on the line. But I haven’t seen parties of six, or ten, or more, at the grocery. It looks like there may be room for four people between the Do Not Stand squares, and if your party is larger, they are encouraging you to spread sideways instead of front to back so the six feet of separation is maintained. Just a guess though. I don’t know what some of those family reunion groups of twenty or thirty will do if the spacing lasts long term . . .