How do you use "which" as a relative pronoun?
I am a native Chinese and Linguistic major graduate student, I guess my answer is suitable:

每周末我们位于Campbell农贸市场前面的商店里都会提供一个舒适的茶座。

Or:
每个周末,我们位于Campbell农贸市场前面的商店都会提供一个舒适的茶座。

Either is Ok and I prefer the later one.