I love meet new people, so I have attended several summer schools, workshops. Some are here.
Eastern European Machine Learning Summer School, 1-6 July 2019, Bucharest, Romania
Summer School on Artificial Intelligence and New Techniques in Information Processing, 6-9 September 2016, Ankara/TURKEY
International Brain Dynamics Summer School, 23-28 July 2012, Marmaris/TURKEY
Summer School on Recent Developments in Signal and Image Processing, 17-20 May 2012, Şirince, İzmir/TURKEY
Neural Networks and Deep Learning, Coursera
The Complete SQL Bootcamp, Udemy