Eichinger, FrankWietreich, ImmanuelSeidl, ThomasRitter, NorbertSchöning, HaraldSattler, Kai-UweHärder, TheoFriedrich, SteffenWingerath, Wolfram2017-06-302017-06-302015978-3-88579-635-0We demonstrate the RecoLeta system for event recommendations. It combines two different recommender approaches: one novel approach dedicated to music concert events and one state-of-the-art approach. We also present our big-data architecture for e-mail delivery and recommendation calculation in an in-memory database.enText/Conference Paper1617-5468