Playing weekly or semi-weekly is the way to go for Diplomacy. Setting aside a full day for it and getting a full complement is too tough.
We played a game of this in the Google NY office this way. It was glorious for a bit -- intrigue upon intrigue upon intrigue. A week between turns really gives you a ton of time to stew over your plans. It got pretty serious; I remember having to call a cubemate (who wasn't part of the game) after I'd left the office and ask him to destroy a planning map I'd realized I'd accidentally left out.
Alas, the whole thing ended in acrimony. One guy who was getting trounced announced he was quitting the game -- in which case his pieces just passively stand their ground and are slowly overtaken -- but then changed his mind and submitted moves the next round after all. Another player called that out as bullshit (and let's be honest, it was kind of bullshit, but it was a friendly game and the rest of us were prepared to let it slide.) It turned into an irate shouting match in the office and the group abandoning the game halfway through. I believe there are still people in the Google NY office that avoid each other in hallways on account of that game.
We played a game of this in the Google NY office this way. It was glorious for a bit -- intrigue upon intrigue upon intrigue. A week between turns really gives you a ton of time to stew over your plans. It got pretty serious; I remember having to call a cubemate (who wasn't part of the game) after I'd left the office and ask him to destroy a planning map I'd realized I'd accidentally left out.
Alas, the whole thing ended in acrimony. One guy who was getting trounced announced he was quitting the game -- in which case his pieces just passively stand their ground and are slowly overtaken -- but then changed his mind and submitted moves the next round after all. Another player called that out as bullshit (and let's be honest, it was kind of bullshit, but it was a friendly game and the rest of us were prepared to let it slide.) It turned into an irate shouting match in the office and the group abandoning the game halfway through. I believe there are still people in the Google NY office that avoid each other in hallways on account of that game.