Oh we're supposed to pray before and after EVERYTHING! Most don't though.
I only ever pray when I feel I have to for show; you know the silent prayers when all you do is close your eyes, bow your head and slowly count to thirty so that everyone sees what a good little witless you are with your super long personal prayer.
Even some devout witlesses, and almost all the R&F, are relieved when they don't feel they have to; if they think no one is looking or aren't around someone they feel the need to impress, they don't pray.
Guesse that throws the whole jaybooger is real and always watching thing right out the window doesn't it?