Gunman's Reckoning by Max Brand

The lantern went out in the tent; she was asleep; and when he knew that, Donnegan went down into The Corner. He had been trying to think out a plan of action, and finding nothing better than to thrust a gun stupidly under Landis' nose and make him mark time, Donnegan went into Lebrun's place. As if he hoped the bustle there would supply him with ideas.

Lebrun's was going full blast. It was not filled with the shrill mirth of Milligan's. Instead, all voices were subdued to a point here. The pitch was never raised. If a man laughed, he might show his teeth but he took good care that he did not break into the atmosphere of the room. For there was a deadly undercurrent of silence which would not tolerate more than murmurs on the part of others. Men sat grim-faced over the cards, the man who was winning, with his cold, eager eye; the chronic loser of the night with his iron smile; the professional, ever debonair, with the dull eye which comes from looking too often and too closely into the terrible face of chance. A very keen observer might have observed a resemblance between those men and Donnegan.