It's happening! See Facebook Group/Poster for details. (Hope it's OK to link to these!) Please spread the news...
Loading were very friendly - they've got an upstairs and downstairs, lots of Wiis around to play with, retro game tables, very decadent cake. Happy to host us as long as people buy a drink or something, which seems fair enough to me.
https://www.facebook.com/events/453602481390350/
It's a cafe not a bar so you don't have to be over 18 to get in, as long as your folks don't mind you heading to London on your own. We'll look after you.
There's Wiis and stuff in Loading to play on so I'm sure there'll be lots to do for guests also.
I would have thought if you are all confident enough to travel on your own by train/what not then why shouldn't you come? It's during the day so you should be fine. - I imagine they either don't serve alcohol in the day, or just require ID but allow anyone in as it says "Great for kids" on their facebook page. xP