"Fat Irish" Green was left behind at the El Cortez.
Houssels left him behind and said he came with the hotel.
Since Irish always at at Benny Binion's (for free) he didn't want to also put him up for free.
Benny's actual response (in vernacular English) was-
"I feed Irish for nothin'. You got to keep him at the hotel for nothin'."
I don't know what the eventual resolution was.
Way I read it was Ben left IG a suitcase for safekeeping, when Ben was known to be dead IG called Lansky, told him about it, and offered to open it in Lansky's presence. It was full of cash, over $500K. Lansky was touched enough to give IG a lifetime RFB comp at the hotel. When the new owner saw the tab hadn't been paid in 20 years or so he cried to Lansky who told him "tough" in effect. For reasons unkniown, Benny Binion took over the FB part of the RFB comp.