I still encounter people who're singing. I recently heard an Asda employee singing along to the music on the in-store radio station. I asked her if there was a cover charge for the cabaret ;-)
I think that I'm slightly averse to people singing in public though because my father had a nasty habit of doing it all too often.
Imagine the scene: you're a 14-year-old lad, sitting in the front seats on the top deck of a bus with your Dad, going shopping on a Saturday morning. You're acutely aware that there are a load of your school mates sitting on the back seats. (Simply being seen out with your Dad, rather than out with your mates, is bad news when you're 14!). Your Dad then decides that it's time to launch into a bit of Gilbert and Sullivan at the very top of his voice. (So it's now time to crawl under the seat). However, instead of singing a 'manly' song, such as "I Am The Very Model Of A Modern Major-General", he suddenly shrieks out, in a high falsetto voice, "They Call Me Buttercup"! (Time to die!)