The BFI Cinema is directly underneath Waterloo Bridge on the South Bank. The coffee bar is at the river entrance, in the BFI itself. There's sometimes a book seller directly outside, under the bridge.
We will probably be the largest group of people, and we'll be sitting around the chairs in the picture. Don't worry if when you walk in you can't see the group immediately, you'll spot a glass partition slightly to the right as you walk in, we're directly behind that. As usual I'll try and keep an eye out for anyone looking lost!
On this particular event, there's no demand that you need to turn up on time at all. (At some other European Club events it is important, but not on this one). So don't worry at all about arriving late. 11.00, or whenever you can get there is absolutely fine. I realise 10.30 on a Saturday morning is a little early for people travelling further.