She Can’t Be That Old
We’ve already mentioned Dicks Last Resort, a famous bar and restaurant in Vegas, where patrons walk away with two things: A white hat with something witty written on the front of it or a Vegas-sized hangover. This grandma seems sensible enough not to get hammered, so she is probably leaving with a hat though.
Someone appears to have a sense of humor and knows some good grandma jokes because this is a pretty good one. Grandma needs to watch out for any religious extremists protesting on the Vegas strip; they won’t take kindly to her saying Jesus went to her prom.