The Westernland Shootin' Gallery lets you try your luck with a mock Winchester rifle in a Wild West saloon setting. The rifles don't file real bullets of course, and when you "hit" one of the targets you trigger an event. There's a variety of targets to choose from; shoot the player piano and you'll get to hear a short tune played, for example.
The Westernland Shootin' Gallery will cost you some extra yen. 200 yen (about $2) gets you a paltry 15 shots. Fortunately when lining up your target there is a wide margin for error, meaning that as long as you're pointing the rifle in the general vicinity of the target you'll probably hit it, so you do get some bang for your buck (so to speak).