Yes, this was during EMH each morning, at both entrances. If I had to guess it would be that it was because it was a busy week and they wanted to get through the line more quickly. I expected every key card to be required because it's just too easy to cheat the system otherwise, but they were very clear that they only wanted one key. A couple of times they went through the line before opening the gates and told everyone to have all tickets but only one hotel key ready.