I just bought some Christmas gifts from JB Hi Fi. The staff all wear trendy clothes but show that they are staff by wearing lanyards.
Dave Jolly tells me that when bike shops are open on Saturdays, the staff don't have to wear their uniforms, they just have to wear a lanyard.
I guess megachurch helpers, if they are trendy, have all their staff and volunteers wearing lanyards. Except for the pastor. He has a Kylie mic.