Instead of being used for serious gambling, these machines were frequently used as entertainment, letting users play games while enjoying drinks. A Golden Age of Antipush gaming slotsque Slot Machines. The advent of progressive jackpots and multi-line slots, among other innovations, in the post-war era increased the complexity and excitement of gameplay. Many players were still attracted to the timeless designs and simple mechanics of vintage slots, which maintained their allure in spite of these developments.