I was in a pub last night with DH, got our drinks and looked for a table. I spotted a couple of women at a table with empty glasses so assumed they'd either be about to leave or get another drink but they did neither. Half an hour later, we were still stood (along with lots of other people unable to get a seat). Their glasses had been cleared by this point. If there had been plenty of seats I wouldn't have even noticed. I wouldn't have the brass neck to do this myself. AIBU?