This is not from the TP USA halftime show. Easily verifiable not. The real halftime show pictures look like this.
https://share.google/images/uK1RQ4gxBgmvRVBng
https://share.google/images/MdKlpr495TlLIDzaW
You can see the venue isn't that deep on the sides though. And all the pictures are intentionally not showing the crowd (180 view from pictures). The venue isn't that big. A large club or mid size rock lounge is about the same size. Still laughable, but we don't need to miss-attribute pictures and lie about their context.
The crowd you see in the first pic, to the left of the stage, is symmetric to the other side, just not shown in the pictures I put in the post. The crowd behind the sight line of the camera is the big question. But if you go by normal venue layouts and make an educated guess based off the width you can see, I would put it at maybe 3x deeper then the stage, plus wings. So maybe 200? No more than 300. So, like I said it would be about a large club or medium rock lounge. Think slightly smaller than your standard House of Blues venue.