So, this varies wildly, but my understanding was that, barring some sort of shenanigan, it’s generally only ‘needed’/expected to tip housekeeping when you make a mess outside of normal usage of the space (like a ‘oops, I’m sorry I left trash everywhere, I was in a huge rush and didn’t have time to tidy up before I checked out’ sort of thing, like a slob tax).

For bus drivers, our street gets together and gets them a gift basket/gift card at the holidays.