Excellent idea for the fireplace mantel. especially at Christmas time. outlets on wall just above mantle so no cords show & hide it year round w decor . Also every high self has outlets for small lamp if there's room between ceiling & shelf .
Easy Electrical Outlet Cover Tip to Fix Mismatched Electrical Outlets and Covers
This would be great for getting an outlet in the hallway. - DIY Tutorial: How to Add an Electrical Outlet. If you already have an outlet in the other side of the wall, you can add another one quickly & easily without tearing open a wall.