From publisher blurb:
Running a freewheeling city adventure can be hard work, but this book gives you a powerful resource for handling interactions with non-player characters — their names, objectives, abilities, and quirky activities! City Encounters provides 200 daytime encounters and 200 night-time encounters for your characters to run into while exploring the city. Plus, each of the encounters has several alternative possibilities involved, so you can adapt the encounter to your players or use the same encounter more than once with a different alternative. Encounters that can lead to adventures are cross-referenced to let you find the other NPCs who might be involved in an ongoing situation, and there are several possible “recurring” villains, heroes, and weirdos to battle, assist, and befriend.
Enter a city filled with anarchists, arsonists, sorcery, skullduggery, factional conflict, and necromancy!
This is the OSR version of City Encounters, written for Swords & Wizardry but easily usable with systems including OD&D, AD&D (1E), B/X, OSE and others!