Funny this topic came up, I just had my first one last night. My mom has been thinking of having one for years and for the last 3 years has asked me if I was going to do one, so I finally gave in and decided to try it. It turned out to be a lot of fun and I think that everyone really enjoyed themselves. I think the key was to send out the invites early (I sent them out 5 weeks before the day) and make it short (mine was only 2 hours). This is such a hectic time of year everyone has a lot of stuff going on and weekends get full quickly.
I had everyone call and RSVP and let me know what cookie they were making, so there were no repeats. And everyone made about 6 dozen cookies and brought copies of their recipe. I had about 15 people and 3 others that made cookies and wanted to exchange, but couldn't make it last night. I just served some appetizers, coffee, tea, warm cider and wine and played some xmas music. There was a really good selection of cookies and everyone seemed to have a good time. I'll definately be doing this again next year!!!
You can email me privately if you have anymore questions.
Amy