Sure, worn a "costume" when hackin' at a wash-tub bass....and playing around and it was expected.

However, if it is not a recording session (where you can wear only your underwear ... if you dare....as long as you are good, are punctual, and stick to union-scale)

A professional attire is required, black shoes, black socks, black pants, black shirt/white shirt-black-tie(depending upon the local prefernce....but black seems to have won out lately)

If you want to SCORCHED!!!! were white socks....the wrath of a conductor makes my own MC tirads seem small.