Card confusion

I went to a party in San Mateo with my landlord's girlfriend's room-mate (seriously). I considered not going but it actually turned out pretty chill. My landlord is probably ~40, average age at the party was probably ~35, I'm 24.

Met an engineer who designs lens-stabilization systems for cameras in spy satellites. We talked about vibration dampening, resonant modes, and the collapse of the Tacoma-Narrows Bridge.

Met a Mexican girl who was talking about leaving to go get some weed. I asked her "do you have a card?," meaning:

Do you have a cannabis card; i.e., do you have a doctor's note saying "RX: copious bong hits in order to treat back pain / migraines / boredom / whatever."

However, she thought I was asking:

Do you have a Green Card or Work Authorization Card; i.e., are you an illegal immigrant?

Got the misunderstanding cleared up and we made out so I guess that means no harm done? In retrospect, it could have been much worse; she might have thought I was asking for her business card, and given me one.

I just need to remember to be careful of possible cultural differences when meeting people who are "4x as Mexican" as me.

Peas out.
V4L.