In the sphere of investment banking, it describes the period when staff have to hang around the office just because their boss is still there. This may also involve staying at the office until an acceptable late time (11 p.m. or later) so that others think a staff member is busy, and no one burdens him/her with more work. Face time in some institutions can extend to as far as 2 a.m. Notoriously, investment banking hours are quite harsh, and investment bankers are expected to spend a lot of time in the office every day. Eighty-hour work weeks are not uncommon.