Our Girl Scout group will be in Brussels for several days, and we would like to have one typical Belgian meal together. We are looking for a place with typical cuisine at reasonable prices (i.e. not high end), that has space for a group of 24, that we can reserve in advance.
Although the description in Rick's book says it's pretty touristy, our tour groups have been happy at Aux Armes de Bruxelles on rue des Bouchers. With this size of group, you should be able to get a set meal price per person, with a few choices.