When is "Christian worship" time?

My children and I were out doing some last minute school shopping at a large retail Mall here in the Detroit metro area. One thing we REALLY noticed was the cultural mix and how well everyone was getting along. That's when we noticed a scarved woman (Muslim we suspect) take off her shoes and kneel down right in the middle of the busy Mall to pray (it was the 8:00 pm hour)...and she prostrated herself right there beneath the foot of many busy shoppers. You can only imagine the stares, snickers and whispers. That's when I really felt inspired to stand up on a nearby bench and proclaim in a bold way that the "CHRISTIANS" in the crowd should take some notes and be so diligent in their OWN prayers and love for JESUS!