Today the Golden Horseshoe (sorry, I called it the Diamond Horseshoe) restaurant is basically a counterservice type place that offers some "free" entertainment located in Frontierland. You can pretty much head in there, order off the menu boards, and find a seat. The icecream dishes looked delicious, but we had the fish and chips and Chicken Strip basket.
As for the entertainment, there are two choices; Billy Hill and the Hillbillies and the Laughing Stock Co. Billy Hill and the Hillbillies is a group of "brothers" all named Billy and they all play fiddles. It's great. They play Thrus., Fri., Sat., Sun., & Mon. at different times during the day (check out the DL schedule for times). You don't have to buy anything to watch and enjoy, though I think it would be rude to take seats away from paying customers (just my opinion).