Any place where prayer is offered is a place of worship. Like praying that the red light will change to green.
However, such is not the primary purpose of a funeral home and not what is meant in NAC 272, Ch. 21, Section 18.
In a funeral home, worship is a secondary purpose. Look for No Gun posting on the door. None such, go on in. While discreetly packing. Very discreetly. It's a Very Sensitive Time and Situation.