I have seen references to CiviDiscount on contribution pages for memberships. Can it be used for a fundraising dinner? Note - I often struggle between creating an event or contribution page for fundraising dinners - both have tradeoffs
You can use Discount for event registrations too, assuming you mean the fundraising dinner is an event sign up?
Here is a proof-of-concept extension that shows how to override bits of CiviDiscount to make it possible. It might be better to fix this in CiviDiscount itself, but meanwhile it's a good way to test and better define the requirements.
This is copy-pasted code from a project. I tried to package it as an extension so that it can be re-usable, but I have not tested it at all. If you find it useful, please contribute to it. There are hardcoded Contribution Page IDs and PriceSet IDs, which should be converted to settings.