På restaurant means ‘at a restaurant’ (however you do not need to use ‘a’-in Norwegian there are many phrases that alow you to leave the article out i.e. på kino, på tur, på konsert).  I must confess that due to the cost of eating out in Norway, I have not dined in very many Norwegian restaurants.  Besides the prices, there is nothing drastically different about restaurants in Norway and restaurants in the United States or elsewhere in northern Europe (that I am aware of at least).  But you will want to know how to say many of the same things that you would say in any other restaurant.  Before you go på restaurant, you may have a few questions.  For example,

Hvilken restaurant skal vi spise på?  Which restaurant are we going to eat at?

Hva slags mat serverer restauranten?  What kind of food does this restaurant serve?

Kan vi spise utendørs siden det er så fint ute?  Can we sit outside since it is so nice out?

Once you get to the restaurant, the kelner (server) will probably ask:

Hvor mange er dere?  How many are you?

And then he/she will probably say følg meg (follow me), bring you to your bord (table), and give you menyer (menus). 

As you look through the meny you will see forrett (first course), hovedrett (main course), and dessert (dessert).  You will also see drikker, including alkohol, brus, kaffe, og vann (alcohol, soda, coffee, and water), among other choices.  When you have made up your mind, your kelner will ask something like, “Er dere klare til å bestille?” (Are you-pl. ready to order?)  And you will say something to the effect of “Jeg vil ha bakt fjellørret med poteter og erter” (I will have baked mountain trout with potatoes and peas). 

When your food arrives at your table, your kelner will undoubtedly say, vær så god (here you are) and you will say takk. 

Mmmm…dette smaker veldig godt!  Mmmm..this tastes very good!

Jeg er mett.  I am full.

When you are ready, you will ask your kelner if you can have regningen (the bill). 

You should be in good shape to eat out på restaurant in Norway.�