Depends on the laws in your state I suppose, but I'm not aware of any state MMJ law that declares it illegal for someone to enter a compassion club without a license. Now, I imagine most clubs prohibit it so as to cover their asses, but I bet there are plenty out there that would let you in without a card.
well im in cali and every clinic ive been to will let u in the lobby cus they dont want a supious parking lot but only those with valid cards/ recomendations are aloud in the back where u can purchase mm