Yes. I pretty much always carry a purse so have one with me. I have a couple mini decks and I'll carry one of those. I never take a not easily replaced deck out with me.
I carry one because sometimes I like to look at cards during my lunch break at work, and if I'm meeting up with a close friend I often pull a few cards for them.
(My purse must haves are pretty much wallet, keys, phone, crystals, tarot, nail file & lip gloss.)