A while back, Metropolitan Police Chief Cathy Lanier announced she wanted to start a book club of sorts, and now, the date of the book club discussion has been finalized. On Thursday, May 1, at a location yet to be determined, the Chief will host a public discussion of pop-sociology books The Tipping Point and Blink by Malcolm Gladwell. Sadly, the invitation doesn’t make it seem like the Chief necessarily wants to keep the book…