A karaoke booth is definitely not the type of venue Doppio was expecting, but... it's probably as safe as anything else? The door has a lock, and the window is frosted, so... it works.

"Thank you again for this, Mr. Leonardo! Um," Doppio starts as he sets his bag down, "Sorry if the, um... My superior at the Legendary Seekers - I'm sorry if his demands are a little complicated."

Yes, he's sticking with that story.