The arcade has three floors, the top two accessible by a stairway on the side of the building (or flying up). The first two have a huge number of arcade games.
The third floor has various inworld games, such as Zombie Meltdown and Fist of Discomfort. Unlike the ones directly below, flash is not required to play them. Lag may be a slight problem, though. The bottom also had a few novelty games, such as "How Sexy Are You." Behind the arcade is a small playable bowling alley game.
Most everything else about the place was decorative. There was a change machine, but it accepts donations. I saw a pizza delivery drone and a fruit n drink delivery one, each when touched offering a snack or drink. There's a hoverscooter, but it can't be ridden.
As for the sim's new look, which is obvious when looking at the area around the arcade, well, that's for another article.
Addition: I was later informed the following games at the Arcade no longer require Flash to play: Killer Instinct, Puzzle Bobble, Sonic the Hedgehog 3 & Knuckles, Splatterhouse 2, Street Fighter II Turbo, Super Ghouls'n Ghosts, Super Mario All-Stars + Super Mario World, Super Mario Kart, Super Mario World 2, Yoshi's Island, Teenage Mutant Ninja Turtles III - The Manhattan Project, Ultimate Mortal Kombat 3, Teenage Mutant Ninja Turtles IV - Turtles in Time