Here’s is a quick tip that I came across in Zingerman’s Guide to Giving Great Service by Ari Weinzweig.

“When a customer is within 10 feet of a staff member, we make eye contact and smile. Within four feet, we greet the customer and engage them in conversation. This applies to internal customers as well, like co-workers,”

What a great way to demonstrate approachability, attentiveness and courtesy!