We have 3 free beds from 27. to 31.12. in one of our groups shared 8 bed rooms at A&O Hostel Hamburg City. Hostel near S-Bahn and U-Bahn station Berliner Tor - from the hostel to the congress it is only 2 S-Bahn stops (direct connection) and just one stop to the main train station.
30€/night - 3 nights 80 € and 4 nights for 100€ (per bed). Our cost is ~130€ for 4 nights but we give it to you for less.
Contact: bogonauten@cs.uni-frankfurt.de / https://events.ccc.de/congress/2023/hub/de/assembly/bogonauten/ / DECT 5131 from 25th / More Infos about us see https://fs.cs.uni-frankfurt.de/37c3-exkursion
Current status see also https://events.ccc.de/congress/2023/hub/de/wiki/schlafplatz/