The Blockspäti ran June 17 to 19 at MENA in Kreuzberg, third year running, with our lead sponsor taking over the building. 930 people came through across three days. Ten-plus side events, a hackathon, a vendor market, three raves, a fashion show, a run club, and a tattoo artist taking payment in crypto.

Here's how Polar's implementation works, what happens to the data, and why attendee privacy is protected at every layer,  by architecture, not by promise.

We deployed RFID wristbands at ETHDenver 2026 and passively measured visitors across 6 days, capturing dwell time, return rates, and real-time occupancy that QR check-in platforms can't measure. Here's what the data showed and why it matters for event ROI.

sub0 hack 2025 demonstrated continued refinement of the milestone-based hackathon model pioneered at Blockspace Synergy, while introducing key innovations around submission categorization and judging processes.