I did my first open house with my cousin last year. She is a jewelry designer and I do candles, air fresheners, potpourri, etc. We anticipated that about 20% of the people invited would come to our open house, and we were about right. So invite, invite, invite!! We did ours in the fall and served cookies and hot cider and coffee. The open house was from 1:00 to 4:00 and we did very well. I made more money at my three-hour open house than I did at the huge craft fair at our local high school, which I had to pay to enter. I would highly recommend an open house. May I suggest you also have a door prize? I offered a candle basket and my cousin offered a piece of jewelry with a jewelry cleaning cloth. Everyone who came to the open house could sign up to win and did not need to be present to win. It was a great marketing tool ... everyone was thrilled at a chance to win a prize and the prize winners have become repeat customers as well. In addition, the slips the guests had to fill out to enter for the prize asked for their name, address, phone number (to call if they won the prize) and email address. We used these slips to add these people to our mailing lists. Good luck with your open house and let us know how it went!!