Found this list of Swiss table manners via the excellent Swiss Miss blog and think they're useful beyond the borders of Bankerland:

1. Be on time.
2. Always wait for everybody to be served before beginning to eat.
3. All meals are usually started with the words "bon appetit" or "guten Appetit."
4. If wine is served, wait until the host begins the toast.
5. When toasting, chink your glass with everybody at the table and look each person in the eyes before drinking.
6. Keep your wrists on the table, but never your elbows. Do not place your hands in your lap.
7. Remember to always say please and thank you.
8. French bread is always torn rather than cut with a knife.
9. Lift your forearm from the table while moving the fork to your mouth.
10. Use your left hand for the fork and the right for your knife and gently push food on your fork.
11. If you are served cheese as a wheel, it should be cut from the centre into slices (as you would slice a pie).
12. When finished, put your knife and fork parallel to one another on your place as if they were hands on a clock indicating 5:25. If you don't do this, your host will serve you more food.
13. Finish everything you take on your plate. The Swiss do not appreciate waste.

Additional children rules: make sure children wash their hands before meals. Children generally must wait to leave the table until everyone is finished.

Good luck with that last one.