sorry for late reply!
I think the dinner buffet is around 300 DKK! It is a buffet dinner with extensive choices...
Otherwise, as you probably know, take the train to the Central Station... Just across the street is SAS Royal. When I meet friends, I usually go there to get their Burger/Club sandwich which is DKK98... You really get value for money! + it's quite and a very nice environment... Highly recommendable.

Enjoy - Maybe next time I'll be able to participate...