Usually in the US if a multi day stay...or I might wanna come back to the same hotel again.
I leave a couple of dollar notes under the remote, I find they leave random coins alone.
I always tip waiters/restaurant, taxi/drivers/guides and concierge IF I use them. Never tipped a bellboy, but they dont carry my stuff either. Doorman are a weird one...I am perfectly capable of opening a door, and finding my own taxi...which is usually only 20 ft away anyhow.
Not a massive tipper or a fan of it being expected but its their system so when in Rome...
