Maybe interesting for people on this list:
In my neighborhood, at the High Tech Campus of Eindhoven, a Seminar and Exhibition will take place on above mentioned date.
There’s also a Hackaton in the weekend before (i.e. 30 & 31 May).
(I’m not sure if teams can be formed up front or the organization creates teams on a show-up basis. If the former, it might be fun to gather a crossbar-team)