The Safety Pin by J.S. Fletcher

Simmons hastened across the street and hurried into the Chancellor Hotel.

But instead of going straight to Miss Pretty's private apartments, he turned aside to a quiet and snug smoking room, reserved as a rule for commercial travellers. Just then, however, there were no commercial travellers to be seen there; such as were staying in the house were either lingering over the supper table or gathered in the billiard room.