On occasion, when I go to tourist hotspots, people sometimes give me their cameras and ask me to take pictures of them. Most of the time, those are digital camera (e.g. smartphones), and it makes sense to take multiple pictures. However, I may be handed a traditional film camera. (I'm experienced in photography, so I know how to operate different types of cameras.)
I read How many photos should I take If I'm given a camera to take a picture?, but none of the answers there address my question. Most suggest taking multiple "trial" shots and having them reviewed by the people being photographed. However, none of those are options with film cameras, where there is a direct cost associated with each picture (exposures on the roll of film), and it's not possible to have the photos reviewed (until the whole roll is shot and they get the roll developed).
Like the other question's author, I also get self-conscious thinking that they're thinking I'm taking too long, because with a film camera, I take my time to make sure the shot is just perfect.
How can I find out how many pictures I should take normally, if I'm handed a film camera? I don't believe the other person would receive it positively if I ask them directly how many to take (it could come across as a hateful comment about the fact they use film, of which I'd had many, or even if not hateful, as me making a judgment on that fact), but that could just be my self-consciousness. I also do not want to be perceived as someone who's naive at taking photos or using a "real" camera (when I've handed an actual camera - film or digital - to anyone, I often see them struggling how to use it, as usually they've only ever used a smartphone to take pictures, and I don't want to come across that way).