So its not like restaurants where they can legally be paid under min if tips make it up but rather that housekeeping tends to be immigrants (often illegal) and thus underpaid. Most hotels will allow you to opt out of room servicing but when you leave they still have to “turnover” the room. Those neat sheets and clean towels all get thrown in the wash. The carpet still gets vacuumed, etc.
All that said I don’t really follow through on this all the time especially as I don’t carry cash as much nowadays.
Being devil’s advocate here. I like to talk about my kid but I also know other people generally don’t care. You care about your kids its rare for other people, even friends and other parents. So idk whether just not mentioning them or caring about yours matters as to his actual dadness. I would also say that your friend may know he’s free those days for one reason or another. Maybe his wife has unreasonable expectations. The kids are always first but it is possible to make time for your relationship and yourself with some communication and luck. There are also often variations in which parent may be “primary” at times.
I have heard and seen some parenting things done that are well outside what I/we would do. Sleep training at 2mo, a sorta family pacifier (toddler would drop it, dad/mom would put in their mouth then back in toddler mouth), the cry it out method, being super stringent about feeding times and amounts, allowing rolling walkers, letting baby play at 2am, piercing ears, circumcision, etc. These babies are still growing up fine as far as anyone can tell.
Your friend and his wife need to communicate with each other and may be helped by couples therapy. You also need to communicate with your friend, judging him from a 2ndhand account by a person biased by their involvement and your own standards is wild.