I stayed at the Excalibur one night and in the morning after I checked out me and my girlfriend went and checked out the fun dungeon. We went back the next day with her niece because it was so fun.
There is a huge neon sign so it's very easy to find. There are stairs or an elevator to get up and down. What I really liked and was very surprised about was the e carnival style games they had. I figured it would be all video arcade games and ticket games. We played the ring toss and basketball shooting one the most and although I suck at both and didn't win anything, we still had fun.
The prices for games are far, either a dollar or 50 cents depending. For the carnival games the prices depend on how many chances you want to play. For example, the ring toss had 100 rings and a small prize for $10. Another thing I thought was good was the play till you win games. They had a few claw machine games that were 50 cents and you kept playing until you won something.
I would definitely recommend to check this out if you're staying at the Excalibur or are just looking for a cool arcade to hang out at.