eli5: Why do slot machines have „[BAR] as a symbol?

bar bar slotYou mht have noticed the BAR symbol popping up frequently on many slot machines, both at land-based casinos and on. This Dream Jackpot casino4.1K+ followers · 85 posts · There are no strangers here; only friends who haven't yet met. Après bar where the PBR flows like the Salmon of Capistrano.