Steve & Darcy
In addition to seeing her best friend marry the love her life, Darcy was on a real live Avengers mission, so this was pretty much the best night of her life. She took advantage of her Stark money for the first time, buying a gorgeous red dress and making sure that her hair and makeup were on point. A small part of her felt guilty that they were supposed to cause trouble at Jane's wedding reception, but she knew it was for a good reason and was determined to do her part to help.
Spotting Steve standing alone, she breezed over to him and grabbed his hand. "Dance with me, hot stuff," she said, not making any effort to modulate the volume of her voice. "You look much too good to hold up a wall and I'm wearing my dancing shoes."