Ich bin an, nein in, nein warte... beim Frisör.
Ever felt frustrated for not knowing which preposition to use when talking about places? No worries, we have done our research and we are going to show you a couple of tips and tricks!
1. Inside a place that usually has four walls and a roof ⇒ IN
Im Park, im Garten (no walls)
Zu Hause (with walls)
In der Küche (even if it is an open kitchen ;))
2. At the entrance, near or next to ⇒ AN
at the entrance, near the station or the platform
Note here: im Flughafen is grammatically correct if you are inside the airport building, but it is not very common to say that. It is more common to say am Flughafen. Same goes for am Bahnhof.
3. At an outdoor place or open area ⇒ AUF
at the party (both indoor and outdoor parties)
4. At someone's place ⇒ BEI
(even if it's a doctor's office or a hairdresser)
at the baker's (in the bakery)
Did you notice that in all these cases we use the dative? Because we're saying WHERE we are.