You laugh, but I once threw a "tasting party" for my friends that went along those lines. You can buy a kit with a bunch of test strips with certain chemicals on them on amazon (search "super taster kit") and see who reacts to them and who doesn't.
Add in some miracle berries and weird food, and you've got a good time.
Losing your sense of smell and taste is a symptom of COVID-19!
Too bad the iSmell never took off and became ubiquitous, or it could be used to screen for COVID-19 symptoms.