I went to a local casino in CA earlier this week and asked for two racks of ones to take with me. The cashier told me that "once I bought them they are mine so I could do what I want with them". I took my two racks and immediately left before the floor could say anything about it.
It's spotty wherever you go. Just be nice, and if confronted tell them you need them for a bachelor party - or just be upfront and say you want them for your home game. No crime, and they will nicely either let you or not. But either way they normally won't throw you out, although it has happened!