At Clarion - we had two types of meetings:
Ritual:
Had to follow dress code. No pants (the push for this was toward the end of my time there - before it was no cord pants or jeans), skirt or dress only. PANTYHOSE. No shoes with tread or laces. Hair must be done, not messy. No spaghetti straps. Pin, badge or lavilier.
These meetings were in our union or sometimes in the basement.
Informal:
Clothing. Period. PJs, jeans, whatever. These are held in the house - first come first served on the couch space!
PAPER:
No meeting, read and sign the 'minutes'

The best meetings.