I just pulled my ID out of my pocket, and went "hey, there is a bar code on the back," so I guess that would be a no.
The only place I usually show ID is along with the membership card at the zoo. Often there's an awkward couple of seconds while they stare at my card; the temporary sticker they gave when I changed addresses has worn down to the point you can't read my first name. I assume they're sitting there trying to decide whether or not it's worth hassling a guy with 2 toddlers over the suspicion he might be sneaking into the zoo. So far no one has said anything, but it's rather entertain to watch them sweat over it.