The only rule I follow is a self imposed one...

I must wear the following every third Thursday after the lunar equinox:

a bright color hawiian shirt
Paisley Tie
Buchanan Modern OR 'Loud MacLeod' tartan
Rainbow striped socks
birkenstocks
a "Fanny Pak" instead of a sporran
Mullet wig

The ladies come running.

[sarcasm mode off]