Trying to be Frugal in Vegas

We are having a blast in Vegas.....we've eaten every meal for free and have used comps to do some gambling. We will see a free show tomorrow called V. We even went to Walgreens and got some almost free batteries for the camera using a $5 holiday RR. We didn't rent a car this time, so we've done a heck of alot of walking and used a free shuttle from the Wyndham.