"I can help the next guest..."
Pardon? Is this a fast food restaurant providing prepackaged pablum in lieu of real food and "now serving guest #42"?
Or perhaps you're going to turn down the bed linens and leave one of those little chocolates on the pillow?
No, you're a bank. And I, I believe, am a customer here to transact business. I am also fairly certain that Miss Manners would look askance at "guests" being left standing in a roped off area, like unwelcome paparazzi at a red carpet affair.
Guest? I do understand you provide coffee on occasion and candy at Hallowe'en and have brightly colored balloons on display at other occasions. But, you remain a place of business dealing with customers who pay for the privilege of you locking up their money.
I know. I'm being pedantic. But, as I explained to someone at work recently, it's part of my charm.