Riley realizes that she hasn't met any of Ross's friends and decides to throw a cocktail party so she can get to know them. Ross confronts Ben about his not-so-secret feelings for Riley and tells him to back off; in fact, don't even come to the party. Not one to take orders, Ben crashes the party, but the night quickly takes a wrong turn when the boys get into a fist fight and a very drunk Tucker spills a few more secrets. Danny realizes he knows nothing about his new girlfriend, Ashley, and goes to great lengths just to find out her last name. Will Danny be able to save his relationship once she figures out how little he knows about her? Meanwhile, Bonnie has some serious explaining to do when a valuable item goes missing.

Riley is not thrilled when Bonnie promotes her to Maid of Honor and demands a crazy bachelorette party, while Brad asks Danny to be his best man and throw an epic, yet dignified, bachelor party. Tucker tells everyone he's going to a television convention in Detroit, but he's actually making his annual trek to Vegas, where he spends one weekend a year living his dream of being a lounge singer. When the boys discover where Tucker really is, they decide to move Brad's bachelor party to the desert, which, of course, means Bonnie and Riley are right on their heels. When they accidentally discover Tucker's act, everyone agrees to enjoy their own nights, but things get very interesting when Bonnie ends up handcuffed to illusionist Peter Oliver. Meanwhile, Danny finally admits to Ben that he's in love with Riley.