[Sundae]

We left a $1 a day in our hotel room in Cuba.
I know it doesn't sound like much, but it was 1996, and American currency gave that dollar pretty much the same spending power as a couple of week's wages.

We got decoratively folded towels, our room was cleaned first on the floor - despite being in the middle of the level - and we got a note when we left to say thank you from the room staff. Aside from the early clean, usually when we were at breakfast, meaning we could be in and out all day, they would probably have done the rest anyway. But we were tipped off (pun intended) by people who had visited previously. It meant nothing to us compared to the cost of the holiday, but it was important to the staff.

I've never, not ever tipped room staff in this country.
Then again, I generally don't ask for the room to be cleaned, the towels to be changed and I often take my rubbish out with me, or at least leave the bin outside the door.
It's not a common habit to tip room staff here. At least not as far as I know.