I’m asking because it’s a very normal thing to do here.
When you enter a room, but also things like a hairdresser or say a small cafe, you say hello to the people there and say goodbye when leaving. Or when taking a bus, you say hello to the driver and goodbye or thank him when getting off.
I was only recently told by some online friends of mine that this is pretty weird in other places. So I’m wondering if I’m (or my country) is the weird one or them
Here in the UK it varies.
In London, even acknowledging someone’s existence on the Tube would likely get you a look that would either your genitals.
Elsewhere, it be better.
In rural communities you likely know someone there anyway.
Up North people can often be friendlier than London - I’ve had some fun times on trains (especially packed ones - a bit of adversity can really bring people together).
See this totally serious news report that highlights regional differences.