Where I live, the weather is far too unpredictable to have seminars this time of year.  In our area, we could have flooding, snow, ice, wind....

Between weather, snow birds, holidays, and parties, it's tough to get a crowd.

Spring and early Fall are best for our area.

I am already having people tell me they wish to hold off until next year. December is a rough time to get anyone to do anything. However, if you are in an area that does not have winter weather problems and you are not charging for your seminar, I still believe it is possible to have a successful seminar and set you up with a lot of contacts to call on starting 2011. 

I would be careful on how much you are spending to put these one. I would estimate 50% attendance of what your seminars normally have. I would also only do one seminar. You may have better luck doing one in December and one in January while people are still working on their New Year's resolutions. It also gives people a second chance to attend that flake out on the first one. 

Again, all this depends on how valuable your time is and what it costs to put on. 

Thanks for the feeback.  I've decided to do two seminars but both the same day .. different topics.  One lunch, one dinner.  I won't  be out of pocket more than four hundred worst case and probably a good bit lighter depending on attendance.  All said, that is one small account.  Seems well worth it. 

Seminar 1: Lunch / LTCi - 300 invites (client & prospects)

Seminar 2: Dinner / Retirement Planning - 700 invites (prospects only)

I'll let you know how it goes.