I play table tennis sometimes up to 10:30 at night. I do it because it is convenient for me to play at night, nice friend to play with and keeps my game up because there good. They don’t start until 7:30. They keep asking me to come, I could play other places during the day if I get the time. The problem is I don’t sleep at night or sleep very little during the night when I play do late. Any suggestions.?