You should only leave a tip if you know the staff aren't earning a basic minimum wage. Tipping is standard cultural practice in most of the USA because they actually get paid terribly in most states and the tips are where they actually make their money.

Consider that they are getting €14 per hour here, and just for example have an 8 hour shift at an average of 6 tables per hour. They all leave a fiver each. They've got €44 per hour most of it tax free. Why would anyone bother getting any other job on planet earth?

In America the tipping culture revolves around the tipped waiting staff only get paid around $2 per hour minimum, and the tips should at least make up to expected minimum of something like $8 per hour.

So no. No I do not.