According to The Poverty Site the 'sectors with the highest risk of low pay are hotels & restaurants and retail & wholesale' and the hospitality sector 'make up 5% of all jobs in London but nearly one-in-five of all low-paid jobs'.
So let's make it easier on these people. Put things back.
If it's a pub why not drop the glasses back on the next round. If it's fast food return the tray and dump its contents in the available bin. If it's a cafe drop the cups back to the counter. If trying on clothes, fold them again or put them back on the hanger.
Put things back.