This is apropos of my pulling a wine cooler out of the refrigerator, looking at it, and wondering if it would be polite to offer it to Darkside if he were over, one-on-one in an informal setting. Darkside does not drink alcohol (except for, IIRC, champagne at New Year's) by choice, rather than for medical or religious reasons.]
When a person has a dietary restriction (medical, faith-based, or other), is it more polite to: