As a common game in homes and parlors, it was frequently played in social situations. Rummy's status in American culture was cemented with the introduction of the 52-card deckaviator app download apk and the standardization of the rules. Many variations have developed over time, such as Gin Rummy in the 1900s, which prioritized skill over luck and was intended for two players. This development carried over into the 20th century, as variations on the basic rules of rummy, such as Indian Rummy and Kalooki, gained popularity in various locales.