SMG, my daughter-in-law took a cake decorating class at a local community college adult program (nights for 5 or 6 classes).
She learned so much about it, including decorative flowers and banding using the pastry funnel that she now does cakes for weddings, showers, friends' parties, etc. out of her home. She loves it and creates some of the most lovely cakes and petit fours.
I would imagine that you would really enjoy it and learn very quickly. Being a good chef and baker (and wine connoisseur

) to begin with can't hurt!
