I haven’t had the chance to try myself yet but I liked how a guy on YouTube took the photo and then complimented them if interaction was inevitable. In his case it was very obvious he’d taken their photo pretty close. Rather than running away he’d say “I love your outfit” or “You look great” etc and then kept it moving. I’d personally only ask beforehand in specific circumstances, like when I’m too close to be inconspicuous or need to stop and position myself very obviously.
I haven’t had the chance to try myself yet but I liked how a guy on YouTube took the photo and then complimented them if interaction was inevitable. In his case it was very obvious he’d taken their photo pretty close. Rather than running away he’d say “I love your outfit” or “You look great” etc and then kept it moving. I’d personally only ask beforehand in specific circumstances, like when I’m too close to be inconspicuous or need to stop and position myself very obviously.