How To Know When You've Come at a Bad Time 101

i just walked into the office kitchen and three men were standing around talking. the last bit i heard before the conversation abruptly stopped was "she was doing some sort of table dance..." and then, a couple of awkward seconds later, he chimed back in "...but not in a bad way." i think it would have been funny if i had of said, "was it something like this?" and broke out into a rumba. but i'm sure that would be crossing a line of some sort.