Here in California, I never see anyone wearing 'nalia to a club, unless there is a Greek party being hosted that night. In that case I will see lots of people wearing letters, but of course, not drinking! As far as "how old is too old to wear 'nalia?"--I for one think you are never too old to wear your letters! I think it's great when I see senior citizens wearing caps or sweatshirts with their letters!