You're going to have a hard time swinging some people in the office on this one.

Personally, I prefer a single indent to make it feel like a block, that way it's clear when the case statement starts and ends:

```ruby
kind = case year
  when 1850..1889 then 'Blues'
  when 1890..1909 then 'Ragtime'
  when 1910..1929 then 'New Orleans Jazz'
  when 1930..1939 then 'Swing'
  when 1940..1950 then 'Bebop'
  else 'Jazz'
end
```