When I go to Costco I usually always stop by the restaurant. I especially like the large combo pizza for $10. It feeds 3 people equally. Just add some beers and friends and you can have a great night without breaking the bank. The polish hot dog or beef hot dog with a drink for about $1.60 (can't remember the price exactly) is also a great deal. I heard the frozen yoghurt is delicious as well but I haven't tried it yet. Nice people work here, they are fast, so have your payment and order ready when it's your turn.
Yum Yum.