You can't rely on other people or institutions to protect you from a fire. That's your job.
When entering any building, here are a few things to look for:
EXITS: Make a mental note of where the exits are located; not just the lighted Exit signs but, if you're on the first floor, windows as well.
DOORS: Are they blocked or locked? Sometimes, restaurant and retail store managers lock or barricade back doors to keep people from sneaking in or out. Musicians stack equipment cases in hallways. Club employees stockpile empty beer bottles and trash in front of back doors. If you ever see a hallway or door blocked, call it to the attention of the manager and the local fire marshal immediately.
CROWDS: Clubs, restaurants, and concert venues all have capacity limitations. If people are jammed in like sardines and make you uncomfortable, move to an exit. If hallways and doors are also packed, report it to the fire marshal.
CROWDS 2: New Year's Eve, Fourth of July, weddings and birthdays, sorority and fraternity parties - when people get together to celebrate, especially when alcohol is involved, safety goes out the window. If indoor fireworks, pyrotechnics, loosely strung halogen lights, hot plates, or space heaters are part of the crowd, maybe you shouldn't be.
FIXTURES: Paper and cloth decorations hanging from ceilings and walls, posters next to hot light fixtures, unstable, lit candles on tables, electric sockets jammed with extension cords. Don't look now but you just walked into a firetrap.