You've got it in one... I'm in my early twenties, mike in his late twenties and both of us remember going to all ages gigs, its how we got into it, biggie is throwing more weight behind supporting gigs that seem to be run very well and have a great vibe going like Funked, SubUrban etc.
Get your mates using biggie private messaging from school and finding out on the Biggie Next Forum where the next awesome party is going to be.