I always walk in you have to sign a waiver for anybody jumping but that's about it
I walked in on a Saturday afternoon it was fine.
Walk-ins are always welcome. You can also purchase jump tickets online for a specific date and time. Happy jumping! https://altitudechicago.com/buy-a-pass/
Walk ins are probably the most common.
You can walk-in, it's better to book in advance though. They only let a limited number of people in for a time a slot
You can, but on some days it gets pretty busy
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