Hi Claire, I started recently with Lenormand but I do carry a deck with me. I don't feel comfortable pulling it out during my commute and I prefer going to a park instead. Lenormand and sunshine is quite an enjoyable combination, I have found.
For some reason, I never seem to go anywhere without a deck of some kind. Lenormand decks are so compact and portable, too!
I may not even end up using them, but it feels nice just having them on my person. It's as if they get to know me better while tagging along.