Rounding up cash transactions, sometimes significantly so (e.g. 80 CZK to 100 CZK) was always a thing in Czechia at least, though it was very activity-specific.

Rounding up cash transactions, sometimes significantly so (e.g. 80 CZK to 100 CZK) was always a thing in Czechia at least, though it was very activity-specific. A restaurant or a pub, yes, a taxi, yes, a bellhop or another hotel employee, maybe (there, the tip might serve as a borderline bribe for being discreet, e.g. if a married man books a room with an unmarried lady for one night). Literature older than 100 years mentions tipping in similar contexts. OTOH tipping would look very strange, say, at the post office. Just not done. Perhaps leaving some very small change on the tray, but that's it. Same with most retail shops.