Light hearted introductions to work related stuff you might encounter is always a crowd pleaser. It makes for great lightning talk ideas too.

However, it might be prudent to point out that these things will feature in the first chapter of any book on load balancing, as an example of the pros and cons of different load balancing methods: least connections, least load, round robin etc.

(Sometimes I suspect picking up a book is becoming a lost art in this day of devops and breaking things fast. Learning from mistakes is all well and good, but there are other ways too.)