En Garde is the only one I've played, and own.
We had about 15 players in the local games club that would do a turn a week, along side playing whatever normal game they were playing. At the start of the night you would get a page with the results of last week, then you would submit your turn either by the end of the night (something you could do during a break) or at some point during the week.
I've also seen it played at conventions between the various sessions so a turn every 4 hours or so.