Captains' practice -- so called because the coach doesn't know about it. My second son was invited to spend the week plus change before his Freshman year in college working out with the veterans of the previous year. Of course, he accepted, and it was timed perfectly to be right after the completion of his summer outdoor league schedule. He slept on a sofa in the Captain's apartment until the dorms opened --and this is the critical part -- didn't help with the rent. The school's compliance officer found out and made him make amends, complete with marks on his Permanent Record.