Yeah, about 4 transvestite prostitutes work around the corner from the hotel. A couple of them are like 6'2" with heels. More "sightseeing" than I expected in downtown Milan that evening...
It's not a full red light district, just about 4 of them, and it's not an unsafe area - but I agree, not family-friendly and an appropriate warning. If you turn left when leaving the lobby instead of right, you can avoid the show.