@Yoric @acodispo actually, everytime I run a dungeon, I think to myself, that I could have improvised the whole thing anyway, playergroups just take a lot of time ... and that's your time to extend the dungeon on the fly.
If in doubt just put some kind of lever into the next room. They'll take time to discuss if they want to try pull the lever, and if so, who's going to go first, if they are quick, describe some strange noise from below ... plenty of time to roll on some random tables ...
@Yoric @acodispo yes, like the players vote their caller who relays the final decisions of the party to the DM. That way, the players can first discuss amongst themselves (and meanwhile the DM roll up some new encounters).
I usually ask for a caller when there are more then say 6 players in the group. It's an old school thing, but it really can make a difference.
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