Tuesday night: It's Linux Users Victoria.
These guys (and of the 50 or so there, 49 are guys) are uber-geeks. Talking to them is a lot of fun - they like the physics, they like the LHC, they even like the grid. Some of them want grid certificates. Personally I think we should give certificates to them - they'd probably fix lots of stuff!
The GridPP Real Time Monitor was a big hit.