Yes, definitely. Cruel not to. You've only got to say 'there's something that needs to be closed'.
Was walking out of Shangri-la Hotel, Singapore, when I noticed a woman stand up from a bar stool, also about to head out for the night. She was wearing a WHITE dress. I quickly approached her whispering in her ear, 'you may like to wear a different dress out', she caught on immediately, thanked me & headed for the lift.