The Wild Life (1984) Art Linson

Great party movie, following the adventures of Bill & Tom, two high school buddies at opposite ends of the spectrum. Bill (Eric Stolz) prefers to live life straight-laced, while his friend Tom (Chris Penn) takes nothing seriously except partying all the time. When Bill moves out of his mother's house to live on his own he faces many issues, from his girlfriend, to his brother, to his landlord. Meanwhile, his friend Tom moves in to keep the rent down but proceeds to turn Bill's life upside down. This movie is non-stop comedy from start to finish.