Think of the final poker table, and some of the baddies at least. Try to remember characters you've seen during Casino Royale - there are actors dotted across looking like them.The set is humongous and there is so much to walk around for. I took my silly glamorous Jimmy Choo shoes, and quite frankly, I had to take them off and move onto my flats half-way through. That said, take your comfortable shoes.
I saw many people in proper black suits and bowties, and ladies in proper evening ballgowns so don’t feel worried about being over-dressed. You are going to the casino and the more glamorous you are, the more suited you are to the occasion.