I've just found this thread and it got me thinking. Although Halloween is not as celebrated here as in the US, I definitely grew up with it. Brownies/Girl Guides groups I belonged to as a child always had some kind of Halloween party with the other Guiding groups in the area and we celebrated at home until my brothers and I were teenagers.
Staples of our family Halloweens included trick or treating in our neighbourhood until I was about 8 or 9, bobbing for apples, carving pumpkins, trying to eat ring doughnuts hanging from the ceiling by string (without using our hands) and wearing scary masks.
Although I haven't really celebrated it properly for the last few years, my friends and I all got dressed up in scary costumes last night and went to a big Halloween party - the house was all decorated in cobwebs, pumpkins, skeletons, spiders etc. and everyone was dressed up - it was great fun and everyone there was in their early-mid 20's!
On a side note about Christmas Carol Singers, I've always understood that people were collecting money for charity (
http://www.woodlands-junior.kent.sch.uk/customs/xmas/carols.html) - we've always given a bit of money to carol singers (not that we get many anymore). There used to be an annual carol singing walk held in our town, where about 50-100 people gathered together and sang carols in different parts of the town in order to raise money for charity.