I went to Adtech once. The highlights were someone in a Google Doubleclick seminar asking if they can run ClickBank hop links.
The best and worst highlight though was a gorgeous curly haired, olive skinned, suited-bird, who I got chatting to when buying coffee.
We were having a nice chat and a laugh and then suddenly, out of the blue, she came over all filthy and flirted with so much innuendo I was completely taken aback. It hit me like a ton of bricks and I went all tongue tied, became incapable of speech and pretty much left. I'll never forgot that.
If only I wasn't an internet nerd, she'd have been walking like a cowboy the next day.