Drunk guy (actor) woofs at shooter (actor) on different table. Lays down 100 dollar bet that he can make a shot. Shooter accepts bet. Drunk misses badly and scoops up his 100 dollars and says he was just kidding. All of this is done loudly to see what the other patrons (not actors) will do.
First time patron tells the bet winner to let it go because the guy is obviously drunk. Second time, a guy gets the drunk to offer a 50 dollar buyout after he loses.
I've had this happen to me. Guy tried to walk off. I followed him to the bar. Asked him to pay up. His girlfriend reached into her purse and gave me the money. Kinda felt sorry for her. Her boyfriend was a shit talking drunk loser that got put in his place and she had to bail him out.