I suggest you look into Angeloni Cedar Garden's in Hamilton Twp on Route 33. They have a few different rooms and I know one of the rooms would work for a small reception. They average about $55. pp and that includes open bar and tax and tip.
Well I am getting married in South Jersey not sure if you are looking into that area at all but Luciens Manor is very inexpensive and they do almost everything for you except photographer, transportation,invitations, and the D.J/Band. They have tons of food and four ballrooms the smallest holding fifty people. They work soully with you to make it to your specific style. You can even get married right at the place because they have a cermony room.