Lean Coffee! Thu 26.6 morning 8:30 at Cafe Wilhelmiina Leave a reply Tweeted a while ago: How about Lean coffee #JKL ? Next Thu 26.6 morning 8:30 at Cafe Wilhelmiina?! @geekcollision@hemppah about Validated Learning for example? So there it is. Let’s meet at Wilhelmiina and we could talk about “Validated learning”, for instance. People old and new, come come.