(dinner meetings) how can i socially explain you don’t Drink Alcohol without making it weird or kill the”mood”

How to socially explain to someone you don’t Drink (smoke or do drugs) without making it weird. People in their mid-late 20s and 30s, any suggestions?

• (I am mainly concerned with the drinking aspect as it is so socially acceptable and prevalent nowadays when I go out with friends or have a business meeting in a restaurant setting)

I don’t smoke or drink or take drugs anymore and I am realizing that it sometimes makes people feel awkward, especially if we’re out at bars and I’m drinking a soda (people usually assume that it’s alcohol alcoholic) and they offered to buy me a drink and then I tell them that I don’t drink and then if they don’t ask why then it usually just gets awkward although some people are just very respectable. any ideas on what to say? Or are there any other social sober people out there in their mid 20s and 30s?

I know that Donald Trump doesn’t drink and he was very successful in business, but he has the story of his brother who died from alcoholism to tell somebody who asks him why he doesn’t drink. I don’t have something like that to say in a business setting where alcohol is very prevalent.