I looked through the vendor booths at the hand bell workshop I am attending and noticed a book series about murder mysteries and whodunits that take place in bell choirs. The size of the print (large) and the cover art didn’t suggest a lot of literary merit, but I guess there must be a market for such books. One of Dorothy Sayers best books is about a death involving church bell ringers.
This made me think about expanding the series to include other groups and professions. What about Death at the Elks Lodge or The Venomous Inkblot?
Think of some mysteries that could be written about your job or group. Motives, victim, perpetrator, weapon, method? Be creative!