Why not talk to them?

"To have fun!" Answered Jesse after appearing in front of their table out of nowhere. "Or to get ****. But for me... it's both." The other boys looked at him in surprise, but without reaction.

"Wha-?! Jesse?! What the hell are you doing here?" One of them jumped up after a few seconds, pointing a finger at him. "And what do you mean by that?" His next question was a more serious one, but not one that Jesse wasn't expecting.

"My, my, calm down, please. I'm just here to play a small game. And please, don't look at me like that, it's not like others can see me anyway. You'll just make an idiot out of yourself." Incubus' hand signaled the standing guy to sit down. "You're probably eager to know what the game is about, right?"

"No!" The group screamed in unison, making other people in the dining area glance at them. "Fuck you! We ain't here to play games!"

"Well, I get your reaction, but... it's not something that's for you to decide." His black fingers snapped against each other and all of them vanished from the room. For others eating there, they were all still sitting next to their table, but they actually were... about 100 meters, up in the air above the building complex. "Then I'd like to explain the rules. If any of you show any kind of objection, I may, or may not, drop you down. It would be a shame, wouldn't it?"