It has always been a customary practice for all renowned theatres to check if a patron has consumed alcohol, and if so, he wouldn't be allowed to enter into the screen.
 

Looks like one such incident has happened today at GK Cinemas, where one drunk man wasn't allowed to watch Mersal. Ruban Mathivanan, the Managing director of the complex said, "It breaks our heart to refuse you entry if you’re drunk, pls be responsible and co operate with us to provide you a better xperience #mersal"

Movie watching is an experience by itself, and to make that more lively and exciting, it would be good if incidents like these don't occur. Also, it might cost inconvenience to the people seated next to you.