The main restaurant does not take reservations, but on the Dawn, there was never a wait more than 5 minutes at the Venetian (except for the midnight chocolate buffet). The Garden Cafe was often crowded, to capacity at times, but most of the time there was no problem finding a table.
For those restaurants that take reservations, I recommend you select restaurants that do not charge an extra fee. See my review at
http://www.cruisereviews.com/Norwegi...gianDawn71.htm