Good Luck from me too - I do hope it goes really well for you. As S'bell said 'Smile, Smile Smile' - if you get anything wrong simply apologise and explain it's your first Friday night.
Whenever I've been to the States I'm always blown away with the friendliness and attitude of waiting staff - always friendly AND polite - that must take some doing.
Course you can do it - let us know how you went on won't you?
Fingers and toes and paws crossed here for you!!

Lynne