I have an ever expanding list of questions I ask potential clients when they ask me for a quote:
Is there a SPL restriction at the site?
Can you send a diagram of the site which includes DJ setup location?
Do you need lighting?
Is it indoor or outdoor? If outdoor, will a generator be provided?
How many guests will attend?
Is it a formal event?
When does the music start and end? Who can authorize a request to continue past the defined end time? (How much will that cost)
When can I arrive to begin setup?
Will food and drinks be provided to me?
Are wireless microphones needed?
Will there be an MC?
Curious to hear others expand on that list.