Some problems cannot be solved by computers. For example, organizing a lunch-break soccer game among co-workers is not solvable via computers. It is best solved by face-to-face invitations. In the last 6 months at my job, I have seen 3 attempts to organize this group. One person setup a small website to send reminders. Another started a spammy, email message list. A third tried text messaging. The problems of these digital format are easy to identify.

1. Recipients ignore the messages. 
2. Messages are often duplicated, distorted, or incorrect. 
3. Responses give little indication of who will actually show up. I

In the end, these attempts fall flat and we resort to the old-fashion method: verbal communication.