A man with a shirt and shorts.

When I was returning from a convenience store tonight, I saw a man talking on a cellphone just beside an entrance of a karaoke room. He was wearing a white shirt with a tie and shorts that looked like inner wears. It seemed like that he had just came out of the karaoke only to take the phone call which could have come from his wife. What sort of excuse was he making for what he might have done inside the karaoke?