Darnation - I missed this brilliant thread by a full 2 days. But here are mine for what its worth:
take a razor and cream and shave your legs and arm pits during the sessions
put a surfboard on the roof of your car and ask the car park attendants to keep an eye on it (my brother in law really did that!)
take a camera with a huge telephoto lens, stand up to take photos of attendants then write something in an A4 pad
wear some too small pants, pre prepared to rip all down the back of the seat when you bend over - be commando underneath
go in a dog suit and have a realistic looking first fight with your friend who is also in a dog suit (OK I pinched that from Dom Joly)
bring along 5 kids all within 9 months of each other, one black, one white, one chinese, one hispanic, one ginger, all real naughty and hyper on sweeties
if you are a brother wear a hat, see how long it takes them to ask you to remove it (15 mins for my ex hubby in 1991 - pathetic, hows a hat hurt anyone?)