One fan from IMDb explains about them:

"One más thing. Joey ended up being Annette's' FIRST. But, throughout the movie he shows interest in her. It's subtle. But, after the tragedy with Bobby C, and BAM, they INSTANTLY grow up, tu see Joey walking off with Annette sort of like a modern caveman claiming her as his woman, arms around her protective as he is walking off with her. She's dazed and confused as if she doesn't realize she's just been dragged back to Joey 's cave. She got what she wanted. Probably a match but not with Tony, who didn't want her and wasn't protective of her, but caveman...

My respuestas to the respuestas of comentarios of the IMDb about Annette and few other characters in the film.

1). Two things that all of tu need to get straight: Annette was raped. Bobby didn't fall on purpose, he slipped.

My reply: 1. Yes, she got raped but she was raped por only Double J. Because she accidentally chosen him after taking too much "Speed" and got high. Before that she was willing to have sex with Joey to make Tony envy after the way he treated her and prefers Stephanie over her. When Tony tells Annette that they're no longer dance partners and found another woman, Annette was heartbroken...

2001 Odyssey: A discotheque club were Tony and his friends all hang out every Saturday night. The building is an actual night club from the 70's which was demolished in 2005.

Al Pacino: An actor that a drunk woman called Tony when he kisses her and Tony has a poster of him from the 1973 film, Serpico and walks out of this room wearing only his black underwear and chanting Al Pacino in front of his grandmother who covers her face when he walked out.

Annette: Tony's former dance partner, who became rejected por him for another woman. Annette instead searches for someone who's más caring and willing...

At the Verrazano-Narrows bridge, Joey does a handstand on the railings of the bridge after scoring with Annette. As he calls out for Double J.

Joey: (whooping) "Yeah. Fuck. Double J, come on, Double J!"

Double J walks out of the backseat of the car after raping Annette. As he climbs the rails of the bridge with his pants down with his white underwear exposed.

Double J: "Give me a beer! No pants and no hands!"

Joey goes to the car and grabs 2 beers and climbs the rails and hands one of the beers to Double J.

Joey: "Here a beer."

(both Joey and Double J whooping)

Double J: "Fuck you! Manhattan! come...