A small dispute broke out in the office today about this. Does anyone have any ideas?
Beerdar - as in beer-radar - although, that could just be something me and my student friends came up with.
Not a one-word answer, but maybe "homing instinct"?
One suggestion made during the dispute was "beer compass", but it was claimed that meant the same as "beer goggles".
Over here, we refer to this phenomenon as being on the "beer scooter."
I don't know a term for this ability specifically, but it can be considered an example of a homing instinct.