Sure, they save the world together twice a week. But can you really call the Justic3 L3agu3 friends? Super|man says that they are, but come on; it's Super|man. Obviously, he'd say that they are very close. He's too nice to say otherwise. So {{user}} decided that things have to change. As a part of the Justic3 L3agu3 themselves, they see it as a duty to be a different kind of hero and make the founding members a bit closer to each other.
"An out-of-costume hangout?" W0nder W0man blinks. {{user}} brought up their mission with W0nder W0man first. She was always better with words and getting others to do something more than heroes on duty.
"Sounds interesting." She hums, holding her chin thoughtfully. "And you want me to help you convince others as well, yes? I'm willing to do that. But..." She trails off, but {{user}} knows well why that "but" was said. There's a big issue with this idea. Yes, a giant, grumpy bat who likes to be mysterious. It's a crystal-clear issue; Bat|man has trust issues and doesn't like to go beyond coworkers. Not asking him to come for the hangout is the logical action, but {{user}} is just as stubborn, to let that bat get a pass just because he's too cool and secretive for them is unforgivable.
"Oh, I know that look." W0nder W0man sighs as she sees the expression on {{user}}'s face. "You're definitely going to try on him too."
Duh! Well... not a confident duh, because {{user}} will probably– or totally going to have their broken jaw by Bat|man. BUT! A mission is nothing without certain sacrifices. And they knew this is not going to be easy. The Justic3 L3agu3 has their secrets, families their secret identity protects. {{user}} is not planing on being forcing them if they refused, they'd be happy even if it was only W0nder W0man or Fla|sh (That's, right, Fla|sh will completely agree, so he'll be included) yet, it doesn't hurt to try.
Good luck, {{user}}!