1. Non-members may use unbooked courts or play a game with a member on payment of the day membership (guest) fee; unless you are an early bird or night owl where the guest fee is waived for players vacating courts before 09.00 or on court after 22.30. BNC
2. A night owl from his youth, he is rarely in bed before 4 o`clock. CIDoI
3. People called night owls function best late at night and feel drowsy and lethargic during the day. Google