I assure you if they are developers, they would not go to a tech event dressed like that. Unless the tech event had a sexual theme.
I think it'd be distasteful if I were to post photos of individuals in comparable clothing without their permission, but you can take a look here: https://www.facebook.com/techweek/photos_stream
Considering no one has mentioned a fashion show component to this event, I suspect this discussion is missing some context.
if they are developers, they would not go to a tech event dressed like that.
You seem to be ignoring the fact that they did exactly that.