Photo by Mike Riversdale
Anthropomorphized tech logos
The best thing about many tech logos is that they sort of look like something else. For instance, Linux aficionados will see someone dressed as a penguin and say, "Ah ha, it's Tux, the symbol of our favorite operating system! Well done!" Everyone else will just say, "Aww, look at the adorable penguin! How cute!"
If you're really feeling ambitious, you might try going as dearly departed Microsoft Office icon Clippy. Bonus points for going up to fellow partygoers and saying things like "It looks like you're trying to pour yourself a drink!"