I found the old railway Speak your Weight machines were no good: they kept saying "One at a time, please". I used to go to Boots the Chemists but they barred me from stripping off and trying to get in that little basket, plus the mesh left marks. Now I use a public weighbridge.(Boom Boom).
I cherish an old Fougasse cartoon from Punch which showed a fat man on the scales. In frame 2 he couldn't bend down to read the weight so he put his specs on, in the final frame he got off the scales and weighed the specs!

RtS