Instead of having lunch, I would nip for a short shooting session at the shooting club. Target shooting with a Walther .22 target pistol calms me and is a great stress reliever. Below was my gear: Czech bullets, German gun and a Japanese watch for company.
At 15 meters, if you are using a basic .22 pistol, its very hard to get a good grouping. However, with a specialised .22 target pistol that comes with a very heavy barrel and ergonomic stock, it is easy. I am able to put in a nice 4 inch grouping (i.e. all shots landing withing the white circle).