Who do cocktail waitresses tip out?

I just started cocktail waitressing at a casino a few months ago. During training, I was told that the only person we should tip out is our bartenders. I've started to notice table dealers and some of the cocktail waitresses tipping out the people in the cash cage when we cash in our tips. I asked a few different girls if this is customary and some ay they tip out the bartender, the cash cage and the housekeeping staff who clean non-glassware out of our sections. Other girls say they only tip the bartenders.

What is customary???? Who are we supposed to tip and how much??

I feel like a cheap stiff finding out that I'm supposed to be tipping out all of these other people, and haven't been... but also a little surprised and am wondering how anyone makes any money when your tipping out so many different people?

Some guidance would be appreciated!