When you’re waiting to order your coffee in coffee shop eg costa coffee and the queues huge and a couple come in and one of them goes to find an empty table to reverse and put their bag on while they queue for the next 25 minutes? 
And people with a tray of hot drinks are stood there waiting for an empty table. I’m currently waiting and can count 4 tables which have been reserved by a coat, hand bag or person!!!
I might just be grouchy as I’m desperate for my coffee 