I actually don't like the type of libraries where there's always an employee posted at the "front desk" for whom you have to pass visual inspection upon entering and even exiting. And sometimes it makes you feel like they are undressing you with their eyes.
This is OUR library - not this employee's personal Library. Not the staff's library. So when you say "welcome" , its like a family member saying welcome as you walk in the front door of your own house. It's actually offensive.
And when you say "Thanks for coming" as we leave, oรฑce again you are acting as if it's your personal library, because you work there. And we the tax paying local citizens are the guests. That's not right. We appreciate good staff . But you are one of us, and we are one of you. We are a community. This is a public venue. Not private.