The bartender admits that this is a nice custom, and leaves it there.
The cowboy becomes a regular in the bar, and always drinks the same way. He orders three mugs and drinks them in turn.
One day, he comes in and only orders two mugs. All the regulars take notice and fall silent. When he comes back to the bar for the second round, the bartender says, "I don't want to intrude on your grief, but I wanted to offer my condolences on your loss."
The cowboy looks quite puzzled for a moment, then a light dawns in his eyes and he laughs.
"Oh, no, everybody's just fine," he explains, "It's just that my wife and I joined the Baptist Church and I had to quit drinking."
"Hasn't affected my brothers though."