Drinking is not legal at all but smoking is ok.
The etiquette for dating is usually group dating. This is because men and women who are not married avoid being seen socializing on a one to one level.
Family members usually are involved with setting up dates, but they have to be creative so they do not get into trouble with the authorities because opposite sexes who are not married are not to be out alone. Usually the men’s parents want to be involved with the whole dating practice to have the best bride for their son especially if he is an accomplished man, Dr, Lawyer, Dentist etc.
Kissing and public affection is not tolerated at all.