Find the
One Club booth and get a player's card. If you play at any of the other member casinos (listed on that page), your play at those casinos will be counted on the same card.
When you buy in at the table, toss your money and your card on the table. If you forget to give them you're card and you're playing $100+/hand, they'll ask you.
Doesn't really matter how much you buy in for.