When you visit the Underground Thrill Club, you'll meet the organizer, Korsima.
After admitting your fascinations with the gigantic lionesses and their... uniquely gentle eating habits, she'll first instruct you to take off those pesky clothes. This is what this place is for, after all, to "safely" explore one's vorish desires.

Next she'll walk you out to the top of a wooden scaffold, explaining how the process will go. You had paid for a lifeline, so with one skimpy harness strapped around your midsection, you're tied to the end of a few hundred feet of rope. The other end anchored to the stone wall behind you. The "free" option to visit the lioness had no such safeguards.

Mbali soon arrives, and places her chin on the platform, its the perfect height. Yawning wide, already drooling, hot breath blasts over the two of you. Korsima steps up and stands next to that steamy wet maw, gesturing that the Lioness is ready to claim you!
When you're ready, she'll help you climb inside.
Or for an extra fee, she could be convinced to get in WITH you.

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Continuing experimenting! its getting better. this is a view I've wanted to try to do for a while!