Telling others about Jesus and the good news of salvation is a joy available to all believers. Some would even consider it a duty or mission that must be done regardless of how it makes your feel emotionally. The joyous and missional aspects of evangelism often times gets wrapped up a layer of efficiency and results. That is, there are times when the Gospel is accompanied by an attitude that seeks to "win" the most with the least amount of effort. In the mid 1900's (and other times throughout Christian history) the introduction of the Fire Insurance policy ruled the day.
Empty Church is for digital natives that are trying to find out how to live the six days between Sundays when the church building are empty.