I can't think of one grocery store that shops clockwise, in fact they are all counter-clockwise. Enter to the right - exit to the left (facing the store from outside) and skate in a counter-clockwise direction.
There is a science to movement in a store and everything else as far as placement in a retail establishment. I studied this in business school.
The most expensive place in a store is immediately to the right of the entrance but not too close to the entrance; high margin, high impulse items go here. Want to rent space for your product? You will pay dearly for this space.
The least desirable space is the first few feet inside the entrance. This is the decompression space. Have you ever walked in a store and had to look around for a cart or hand basket? You missed them because they are behind you. It takes a few feet for people to become oriented and they walk past with out noticing the first few feet.
High margin items (like store brands) are to the right of name brand-low margin items because people always compare a substitute to the item to the left, you know you have done it. The store I shop has dish washing liquid that is made by Dawn; same bottle, same cap, same back label, only the front label is different and the "blue" is a shade lighter (dawn has a trademark on the color). The store brand is to the right of Dawn. High margin items, even though sometimes cheaper, are always to the right. Check it out.
Why in the Hell don't they open another register!?!?!!? There should be a minimum of 3 people standing in line not counting the person being checked out. Those racks with gum, batteries, candy, etc are called impulse racks by the trade. They need you standing in line so you will stare at a magazines and such so something will peak your interest and you will grab it.
Then there is the "scream factor". Candy at low levels in the impulse racks, colorful cereal boxes with "prizes" inside at knee level, these are there for the kids to show their ass in public so mama will by it "if you will just shut up". Embarrassing mama in public has made many store owners rich.
Those displays in the middle of a travel lane are there to break up the travel pattern and steer you head-long into an impulse/ high-margin item/area.
Staples like dairy, bread, eggs, snacks, soft drinks, the devils brew, etc.. are placed in the far reaches to the left back of the store so you have to pass the buy1 get 1 free frozen pizza and other goodies on the way.
As a homework assignment we had to go to stores and verify all of this. Its true. Check it out the next time shopping.
My wife hates to take me shopping.
End of Tubercle's marketing lesson.