Anyone running an indoor kids play business?

I recently saw this video post of RC heavy machinery inside a coffee shop. My first thought was "that's as much for kids as it is for adults!". Either way, I know kids would LOVE this, I know my kid would, and he's only 2 right now.

I'm in software so know almost nothing about brick and mortar, but I do know that as a parent I'm willing to pay money every weekend to take up 1-2hrs of time to keep my kid busy/active. That got me thinking about all the play gyms, kids art studios, kids-specific pools, and even children's museums that are around. Are these good businesses?

Getting most of them off the ground is probably not too expensive, and they don't need prime real estate, but I'm surprised there aren't more of these around. I do know that generally they're all very expensive!

Does anyone run one of these or know someone who does?