YSK Olive Garden, Applebee's, and other restaurants charge a "table game fee" if you play a game on their tablets

Was at Olive garden waiting for food today while I started checking out the tablet they had on the table where you could order food, pay the bill, and play games. I had never seen one so I decided to check out a game. Played one level and closed it out. When I got the bill I noticed a $1.99 charge for "table games". Whatever warning there was, I didn't notice. The kid at the table next to us was playing with it to, and it makes me wonder just how many people are getting charged and not realizing it.