Hi, Brandy! I think the question you are referring to was about making a room only reservation separately from an exisiting reservation that had a free dining promotion attached. There isn't a dining discount, but what the other guest was asking was if they have a reservation without the dining promotion, could they use an alternative discount.
There are occasionally room only discounts available at Walt Disney World, but you can only use one promotional discount per reservation. If you have separate reservation for your one night room only, you may be eligible to use a different discount.
You can view all available discounts by checking out the link for
Walt Disney World Special Offers. Check and see if you are traveling during the dates that discounts are being offered, and you may be able to re-book your one night, room only reservation using a discount.
I hope I answered your question, and I hope you have a wonderful vacation!