You still have to fill out the application form at the door and you will need your passport as ID.
Only a few print the membership cards there and then, others will mail them on to you.

You must wear shoes, no short trousers, no sleeveless shirts.

Some casinos still require you pay a joining fee or be 'invited' to join.

Do you recall which ones you had planned on going to? Are you going to play? get chips? wine and dine? or just to look around? I could tell you which are worth going to and which not