In Atlantic City, a line of credit is no different than a post-dated check.
After you fill out an application,they check your average balance in a checking account.Thats what they use to establish your limit.If you are looking for several thousands on a credit line,you'll need to give them access to an acount with more.
When you draw on your credit line,you sign a marker. If it is not paid in full in X amount of days,its simply handled like a check and is deposited against your checking account. You do not want to bounce one of these.
Other than you signing for and paying off your marker,I don't think you'll get more scrutiny or comps out of the deal.Perhaps Vegas and elsewhere are different,but thats how AC works it.