I've honestly wanted to do airport shops before but I VERY rarely do them. There's just too much crap going on for me to add a shop to it. Travel days tend to be long. I don't feel like doing a report when I get home or to my destination. I always say I'm gonna do work on the plane but I rarely if ever do unless I'm in 1st. It's just too much of a hassle. There are a few shops I'll do, but not many.
You might also look for valet & in flight shops while traveling.