I dont recall tipping ME, we just followed what everyone else did.
Took our own luggage to the room.
We did tip for delivery from Garden Grocer, but don't remember how much.
Have never tipped house keeping anywhere I have ever stayed in any country. Had no idea anyone ever did? Having said that I (nearly put "we", but as only female in family, defiantly "I") always leave the room tidy and clean up after us, so not a lot for them to do. (I am the sort that rinses bath out after use/wipes down sinks after use etc).
We do tip in restaurants, more to those that leave us in peace! We find it all far too over the top, being asked very couple of minutes if everything is alright and if we want another drink (when we still have one) is very irritating and stops us enjoying our meal. Planet Hollywood we had a particularly bad experience of this. I don't really like the whole tipping thing, surely the amount we pay for accommodation, meals etc should enable the businesses to pay the staff properly?
Also did a few sums and decided they seem to be on to a good thing with these tips, do they not get paid a wage?