i work in a restaurant/cafe kitchen, we've had some awesome requests before.
"Can i order something that wont smudge my lipstick?"
"Can you put my soft drink through the blender to take the bubbles out, they hurt my tongue" (hence we gave them cordial)
this one takes some explaining. we have outdoor seating, theres some sparrows that fly around looking for crumbs and what not. we cant scare them off, they are used to humans now. we had a lady sitting outside complain to one of our waitresses, she said (in these words) "i think its really unacceptable to let birds be around these tables, what with the bird flu going around." dead set moron.
there are more but i dont remember them off the top of my head