Help me out with this, OSR folks.
Room keys put various forces in various rooms. However, it seems to me that more often than not, one of two scenarios unfolds: the characters probe the position and withdraw, or they raise the alarm and face the massed force of a faction in a corridor or room.
I do not seem to have a situation where a few critters at a time hit the party; even savages will mob up and face off if they have a chance, attacking en masse rather than being picked off a few at a time.
What am I missing? Why would you not note where people tend to hang out in a room key, maybe, on the off chance there is infiltration–but plan for confrontation at a few choke points all the time?