None, but long ago I did attend a Paesach(spelling) dinner where all present who didnt have a yamulka were expected to cover up with 'something', I had to eat seperately because I refused to wear a napkin on my head. I was'nt alone in my expulsion from the main table and us outcasts preceeded to spoil the event for everyone. I was never proud of my behavior until introduced to the JQ on the net.