He spends his weekends doing twelve-ounce curls at the local bar.
twelve-ounce curls
idiomDrinking beer.
Origin
disputed originFrom the size of common beer containers (bottles and cans) in the United States: twelve ounces + curls, a weightlifting exercise.
After a long week of hard labor, the construction crew relaxed by doing some twelve-ounce curls.
The weary travelers sought refuge in the tavern, where they spent the evening engaged in twelve-ounce curls to forget their troubles.