We tend to think that most old people sit around quietly at home, sipping tea and watching the news, but it turns out they’re up to something a little more rowdy: getting hammered! A new report on binge drinking from the CDC found that the 65+ age group binge drank most often. Grandma, you sneaky little tippler!

The silver set might binge drink most often, but it’s the 18 to 34-year-olds who have the most binge drinkers among them. So while the nursing homes may have the most hoppin’ parties, never fear, the frats haven’t fallen too far behind. Still, next time you see your favorite senior citizen, you might want to ask them what exactly is in that innocent looking coffee cup.