Some have looked like vacated buildings. Weeds, trash, paper, and debris filled the lot and edges of the building. Peeling paint, dead flowerbeds, and tall uncut grass leave a lasting impression. I once visited a church and followed the sign. The only problem was the sign led to a church that was closed and had merged several years ago with the church I was looking for.
Some churches are in bad locations.
Too often the members treat the church like their private house where everybody knows their way around. The church is a public place for the unchurched. There is no sign or a person to direct her how to get into the church. Put up bulletin boards that announce coming events that newcomers and visitors would especially be interested in attending. Welcome visitors and guests early in the worship service.