| Opens | Closes | |||
|---|---|---|---|---|
| On site - GRNOG members | 31 Mar 2026, 13:10 | 22 Jun 2026, 23:59 | 121 / 160 | Register |
| On-site - Guests (non-members) | 31 Mar 2026, 13:10 | 22 Jun 2026, 23:59 | 17 / 40 | Apply |
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Serafio City of Athens
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