If you go to the ChipGuide ( www.chipguide.com ) and click on the state of Nevada in the map -- then go to the top right of the page and you'll see three parameters where you can change the City selection to just Laughlin from the list then click GO. What you'll see is a list of all the casinos in Laughlin and you can check the slot cards issued from each. The list you get from the sort will indicate which casinos are still open and which are closed. If you're just interested in currently open casinos you can change the Status selection to just display Open casinos, limiting the list further.

Right now, there's no way to limit the list to just those with slot cards but hopefully future enhancements might add something like that.