I think central banks print the money, coins are what cost more than their face value (small denomination)
Thing is banks want us to go cashless because they get a slice for every transaction. With cash there is just you and person paying it to. Cashless requires a 3rd party middleman... the banks $$$.
Also when payment systems go down you have big queues of people in supermarkets with no way to pay for their goods.
Cashless can also be completely tracked.
Anyhow, on tipping, if end up with €1 or €2 I'm likely to leave it behind, otherwise by end of night I end up with 3 tonnes of change in pockets
If was waiting for ages or just shit, well I'd keep it.
It's a shame hard working people have to be reliant on such things.
Perhaps should do it with headliner acts, don't pay them just have a massive tip jar at front!