Internal company classic computer event

Hi all, enough lurking and time to ask a question.... The software company I work for is planning an internal classic computer show as a little light relief near Christmas. We expect a turnout of around 100 people and so far have the following planned: 1) Show as many vinatage systems as possible, ideally working. "vintage" in this context means anything pre-90 as best I can tell but modern rare machine may be shown too. Think ZX81, C64, etc - mostly home machines. I'm personally plannig to show my Transputer collection, though I expect very limited interest :) 2) Have a collection of classic software & games running on emulators "3) retro" music 4) beer and snacks (not vintage) 5) Competitions for high score on classic games and best retro dress! 6) Possibly invite a well known talker or two, depending on how much interest we expect to generate and/or finance. Has anyone helped organise something like this before? is there anything that worked particularly well/failed miserably? This is a small scale fun event and not on the scale of VCF! Many thanks for any advice James