FWIW, in DC last week at the Grand Hyatt, I walked up to the GP line and when another guy on the regular/standard line soon saw me move forward to address another front desk clerk ahead of him, he proceeded to whistle nastily at me very loudly and then informed me that he too was waiting and that I should just step back!
VERY classy I thought!
I told him that I saw him and just thanked him!
Ironically, the phone then rang and "my" agent became occupied with that and so he, ie "the whistler," actually got to see "his" agent first anyway! Ya' never know!