1) There’s vendor booths outside that’ll sell you supplies, or “I Conquered the Dungeon and All I Got Was This Leather Jerkin”-type items
2) Skeletons in the first room don’t even look up when you walk in
3) Glossy trifold brochures with complete maps littered everywhere
4) No one reset traps after last use (spike pits open, etc.)
5) You have to take a number and wait in line to face the “villain” at its center