Related Clues:

• Cooler places?
• Joints
• Coolers
• Hacks' workplaces
• Cans or jugs
• Places found up the river?
• Places for cells
• Correctional institutions, slangily
• Where people do stretches
• There are sentences in them, and what is on them
• Jails
• Sites of many bars?
• Con containers
• Attica and San Quentin
• Not quite proper boys - might they end up in these?