Follow the signs
Respect visitor routes and any photography restrictions. Check with staff before entering a lobby or courtyard that appears to be part of a private building.
Keep your group moving
Discuss a detail from the side of a walkway rather than blocking a door. Choose a wider meeting point for a longer conversation.
Leave with a clear route
Look up your next leg using the exit you actually reach. Architecture walks often finish at a different edge of a block from where they began.