Would it be 4 women and 4 men, it would still be out of context and not right. I don't know if it's more jackass or more redneck, anyway it's not something that should be encouraged.
"Booth babes" demoing products are OK during the day, but if you dim the lights, perceptions change.
Were you not aware of that?
[1] http://icanwritefunny.blogspot.com/2012/03/gdc-2012-booth-ba...
People still do it, but by this time 5 years from now, everyone who does will be a pariah, trading on shock value. Those people/companies will always exist. Their existence isn't evidence that what they're doing is OK.
That said, this sub-thread is more nuanced. This article wasn't written because of "booth babes" offending someone at a conference that Microsoft helped sponsor.