Rosie,

As with most people, anyone younger than me is youngster!!!

Trad unaccompanied (or accompanied) singing (yes we do some of it, amongst self penned but trad sounding stuff) goes down pretty well at "non-folk" venues in our experience..... but it has to be done very well, there isn't the "politeness" that you get in the folk world. If you're crap, you soon find out.

Go for it. I think you'll get a good reaction.

Paul