The cast members at the Polynesian would try to find alternative reservations for the guests at locations throughout WDW. (If one finds out about the cancellation of the dinner show while in the parks, stop by Guest Relations and they can work some magic most of the time). There are other options if all the other places one wants to go are full, particularly during the holiday season. If one feels like a gambler, one could try standby seating at restaurants. Certain locations , like Tepan Edo, which needs to fill 8 seats at a table can sometimes accommodate standby seating (small parties, 1-3 people can increase one's chances). Finally, as a last resort, go to the restaurant of one's choice 20 to 30 minutes prior to closing, inform the cast members of what happened with the cancellation of the dinner show (bring along a copy of the reservation), and if they possess the true 'Disney Spirit,' they will seat you.