Beer Koozies

My apartment complex has a green area in the middle that looks like a city park but it's only for residents. They show movies on weeknights and sometimes host bands on Saturday afternoons. We bring our lawn chairs down and mix with the neighbors. Alcohol is prohibited, but as long as you're not dancing naked the local security guards look the other way. Just about everyone you see has a bottle of wine tucked away while they drink out of plastic cups or beer cans loaded into non-descript koozies. I told one of my friends it was fine to bring beer as long as he packed a few koozies. He showed up with a case of beer and four Pabst Blue Ribbon koozies for us. I should have been more specific.