A meal in total darkness can allow you to think about several topics depending on the approach. These can be the dominance of the visual sense, disability awareness or purely playful.
We can combine the meal, within an event, with « fake news » or with optical illusions with a more general theme on our perceptions and the biases they imply.
It’s also a « social time » when it’s nice to meet people without seeing them !
Remarks
Simple foods in small quantities for each food can multiply the game of taste recognition.
It will be necessary to provide thick and dark sheets and good gaffer type tape, to block out all the light from the windows.