What's the difference between " at a coffee shop" or " in the coffee shop" ?

" at a coffee shop" 和" in the coffee shop" 有什么区别？

You were where? - The coffee shop.

在哪？- 咖啡店。

That was coffee shop owner Tim Hayward.

以上是咖啡店店主蒂姆·海沃德的话。

Tim Hayward is a coffee shop owner.

蒂姆·海沃德是一位咖啡店店主。

Washington, D.C. has some great coffee shops.

华盛顿特区有一些很棒的咖啡馆。

I like to write in coffee shops.

我喜欢在咖啡店写作。

Tom and Mary are in the coffee shop.

Tom和Mary在咖啡厅。

So I just found a coffee shop here.

我刚在这里找到一家咖啡店。

For example, I like the ambient noise of coffee shops.

例如，我喜欢咖啡馆的环境噪音。

Actually, it's more than a coffee shop.

事实上，这不仅仅是家咖啡馆。