Chocolate Fest is held in Hershey (coincidence?) at the Hershey Lodge each year in mid-January. The festival is typically preceeded by the Chocolate Ball, also at the Lodge.
Both events are not free, tickets are required. The event is held by Keystone Human Services and helps to fund their operation.
If you are a chocolate lover, you need to attend one of the sessions. Check their website for up to date information.
Image Credit: theogeo