Student or Learner
I always have trouble with the two prepositions, "in" and "at".
(ex) meeting your friends at or in a church
If you meet your friends at a church, does it mean that you meet them outside the church?
If you meet your friends in a church, does it mean that you meet them inside the church?
Some of my native English-speaking friends say that the two prepositions can sometimes mean the same thing.
Please explain the usage of the two prepositions. Thank you very much.