Cards aren't required here. It's legal to buy. You just walk up, show your drivers license at the window to prove you're you, and they tell you when it's OK for you to enter the store (limiting people). Everything is in glass jars for you to see and smell with a description of what it is and cost. It's literally like the adult version of being a kid in a candy store. lol You then go to the counter and say how much you want of whatever it is you want. They prepare your purchase for you, you pay, and out you go.
Now medical marijuana is another matter. Same dispensary (a pot store), but only those with a medical card can buy it. I find it odd you can buy any weed you want in the store, just not the medical stuff. I THINK it's so those with a medical need have it available to them when they need it. I could be wrong about that though. I'm really not up on this sort of thing.