Hubby wears a suit on formal night (WITH his Eastern Diamond Back Rattlesname Cowboy Boots)
however, a shirt, tie and dress slacks will be sufficient. He wears a Polo and Khakis for the other nights.
BTW, just picked up a pair of Dockers for $9.99 (regularly $49.00-69.00) at Dillards. Grab a pair on sale and wear them every night. Hubby changes back to shorts after dinner.