Question for British viewers

I noticed that the characters and people in general seem to have a song for every occasion. There was a lot of singing in the series with everyone joining in. This is pretty cool, but I was wondering if it was accurate. Do people in Britain join in songs together a lot, or is this a thing of the past. Again, I think it is cool, and am in no way trying to be disrespectful, just neat how they seem to have a song for every occasion and everyone knows the words to join in. Was just curious if this was an accurate portrayal.