All of the supermarkets in town (trader joe's, whole foods, ralph's) have huge wide aisles for people to push huge wide shopping carts, or massive double strollers through... so they can fill the backs of their gigantic vehicles parked outside in the enormous parking lot.
Things in California are big.
The nice side effect of this super-sizing is that I can roll-up, fold-up and shop without any problems at all. AND even if someone were to complain (not one yet! -usually I get questions and comments about how it is the coolest thing they've ever seen), I could just pop the bike into a freaking huge shopping cart provided by the store and still have room for shopping.
I'm really surprised that Bromptons are not more popular out here. They are perfect for around town. A few more knowledgeable people have asked me "is that the english bike?" and mentioned they've heard of, or own Fridays, but not the Brompton. Strange!
The best part is that most of the stores are uphill from our street.
A full basket is a breeze on the way home. :)