Complex sentence: Hobson takes Arthur to an Alcoholics Anonymous meeting, where he complains about it being depressing and making him want to drink, then he proclaims he is going to drink while accidentally bragging about his money, and turns to leave the meeting.
Split into simpler sentences: Hobson takes Arthur to an Alcoholics Anonymous meeting, where Arthur complains that it is depressing and makes him want to drink. He proclaims he is going to drink, unintentionally brags about his wealth, and turns to leave the meeting.