Complex sentence: Irving leaves Billy in the car as he goes to a rec center to play Bingo with other older folks, doing various odd things such as drinking the ink from the markers before pulling out a margarita maker and blending drinks for everybody.
Split into simpler sentences: Irving leaves Billy in the car as he goes to a rec center to play Bingo with other older folks. Irving starts to drink the ink from the markers before pulling out a margarita maker and blending drinks for everybody.