The pertinent statute provides that
"It is lawful for a minor to be on licensed premises in a room in which is located a bar over which alcoholic beverages are sold or dispensed by the drink if all the following conditions are met: (1) The minor is eighteen (18) years of age or older. (2) The minor is in the company of a parent, guardian, or family member who is twenty-one (21) years of age or older. (3) The purpose for being on the licensed premises is the consumption of food and not the consumption of alcoholic beverages." http://www.in.gov/legislative/ic/code/title7.1/ar5/ch7.html
What this seems to mean, in terms of the question you ask, is that if the married man is over the age of eighteen, with his wife (who is over 21), he can be in the bar (but not at the bar) if he is there to eat, and not to drink.
Lawyer.
27 years practice of law