Okay - here goes my answer:
Baseball park in (or against) California - I'm actually thinking more of "against" because the sign looks like it gets changed.
We're probably after the game, because it's dark - so, maybe 10pm or so. This is not a major league game because the stands are nowhere big enough. So, I'm guessing minor league. There is a building behind that looks like a grain mill or maybe a hospital. It's hard to tell in the dark.

Both of the people have amazing teeth! She has a nose ring and is wearing mascara.
found the hat just now. It's for the Fresno Grizzlies. :-)
Double piercing on her left ear. And she's engaged, but not married yet. But she's been engaged for awhile because she's more excited about being at the game. Her necklace is interesting. I'd like to see the front of it... as it looks like it's reversed. It almost looks like a Catholic necklace - of Mary or one of the saints.

Impossible to tell if he's wearing the Coca-Cola shirt because he loves the drink or because it's a good (and comfy) blue sweatshirt. He wears two necklaces. One is on a black cord with five beads on it. The middle one looks like aventurine surrounded by (maybe) white coral and wooden beads. The other necklace is a metal chain and I'm really curious about whether it might match her necklace.
His beard really suits him and he's genuinely happy (as is she.) He has brown eyes. Hers are lighter, but probably green or dark hazel.

I really don't like the building behind him... it feels old and disused (the polite term) - and perhaps even haunted.

My contest is still up (one more day) without any amazing revelations about what people have seen... https://steemit.com/contest/@viking-ventures/observation-game