Free Slot Machine Games on Facebook. As social gaming sites offering such popular games as bingo, poker, and slots, the industry is slowly grow into a. Social Gambling Guide - Discover how you can play top real money casino games on Facebook and other social media channels - Play for free & win big!. It's hard to keep up with all the new Facebook slots games released, because a handful of the games have attained crossover appeal. I want to highlight some of.