STYLETHREAD -- LET'S TALK SHOP!

I don't have THAT much experience with this, but I would say don't order anything that you eat with your hands (unless it is that kind of restaurant) or that can be potentially awkward to eat, like spaghetti or lobster.  Also, if it seems like everyone is leaning toward a certain category of food, like everyone is getting a dinner salad, I would probably just order a dinner salad, too, even if I really want the steak.  Don't order more (or less) courses than the rest of the people at the table.  I wouldn't order a dessert unless other people did.

I'm sure you already have good etiquette though.  You'll be fine!

As someone who does this at least once a week, but normally more like twice or three times, I would say order want you want.  Everyone else at the table will be.  As long as you have nice table manners you will be fine.  Just brush up on which one is your water glass and enjoy the dinner. 

When I am with colleagues at business dinners I never cringe over what they order, but have found that some people do not understand what are appropriate topics of conversation.  As long as you understand this (I'm sure you do), you've got it made.  It is amazing what some people think is appropriate to discuss over the dinner table.  Hard business should wait until after dessert, anything that talks about fluids, horror, religion, politics, etc. is strictly forbidden.

Beyond that keep your elbows off the table and ask your clients if they want to order wine and if so, what they like.  Then ask the waiter for his rec. if you are not a wine person.  I've found that the more wine you get in your clients, the easier they are to deal with...and if your table manners aren't stellar, the more wine they have, the less they'll notice!