I carry a filled Zippo everywhere I go (although I don't smoke - it's for lighting others' cigarettes). It fits perfectly in the coin pocket on a pair of raw Japanese jeans, where it will produce a fade[0] unique to the lighter and its wearer.
Before covid-19, pretty frequently. For instance, I once noticed that the end of my shoelace broke off. If you want to prevent continued fraying, you can use a lighter to melt the end of the lace. Besides that it's a well-designed, classic looking, functional tool that I enjoy handling.
I live in New York, where smoking is more common, and I've found an abundance of social situations that become available when a stranger needs a light.
[0]: https://www.heddels.com/2019/04/fade-day-unbranded-ub421-14-...