Disneyland Paris is offering guests 2 free nights in a Paris hotel when booking a 4 night, 5 day hotel plus ticket package. The offer is valid for arrivals up to September 30, 2009.
The 2 extra nights are free, but you must pay for an additional 2-day ticket if you want to the spend the time in the parks. Disney is promoting the offer as a chance to visit Paris itself for a couple of days.