Every Friends Joke

The whole gang is out in a park to play football. After Monica's team scores "seven to nothing", she gets all cocky and says to Ross and his team: Monica: Losers walk. Ross:  Yeah? Losers talk. Chandler:  No. No. No. Actually, losers rhyme. For some unknown to me reason audience finds it funny. What does turn Chandler's comment into a joke?

Phoebe and Monica are talking about brothers and the games the used to play when they were little. Monica: - Oh, we used to drive each other crazy playing the shadow game. Phoebe: - Oh, how do you play the shadow game? Monica:  - Oh, how do you play the shadow game? Phoebe:  - I just asked you. Monica:   - I just asked you. Phoebe:  -  I don't have time for this. Monica:  - No, that is what the game is. Phoebe:  - You just gave up really quickly. What's shadow game? And what's the joke here?

Chandler is afraid of a big commitment coming his way if he keeps dating Janice. He complains how in a restaurant Janice put a half of her chicken piccata on Chandler's plate and took all his tomatoes without asking. Rachel and Monica are very upset with Chandler. Rachel comments. Rachel: Men are unbelievable. Janice thought she was giving you chicken. She didn't think she was giving you scary chicken. What does Rachel mean by "scary chicken"?

Phoebe tells the guys that she's just met her sister's stalker and how cute he is and how she is going to help him to get over Ursula(the sister). Meanwhile Joey has a mouthful of a scone. And when Joey answers Phoebe the breadcrumbs fall all over her. Phoebe: I asked for news, not the weather. I assume the weather Phoebe is talking about is about the spray of breadcrumbs falling onto her. But what's the deal with the "news part"? What "news" is she talking about?

Chandler and Joey are in a fight over who is sitting in a chair. Ross wants everyone to get dressed for a museum benefit of his. Ross suggests Chandler to go change first while Joey is in a chair. And after that Joey would go, and Chandler could sit in a chair. Chandler in annoyed, yet heads out of the apt to go change. On his way Chandler turns and scrams at Joey. Chandler: When I get back, it's Chair City. And I'm the guy that ... sitting in the chair! Audience laughs and I have no idea why. What is Chair City?  Is that a saying? Or some famous company? Game? What does Chandler refer to? 

Rachel and Ross are at Barry (former Rachel's husband-to-be) and Mindy's wedding. Rachel is a bridesmaid of Mindy today. She has just walked down the isle with her skirt caught in her panties. Rachel: This is so humiliating. The only thing that tops it is when I was in eight grade and I had to sing the "Copacabana" to the entire school. Does she imply that "Copacabana" is a bad or not sophisticated enough song?

Chandler is having an Internet-based relationship with some woman he has never met in person. Phoebe is reading over his shoulder: - What does she mean by HH? Chandler shyly: - It means we are holding hands. Phoebe surprised and slightly mocking: - Are you the cutest? Chandler accepts laughing: - I'm afraid I might just be. Even though all the words look familiar in "Are you the cutest?", the way Chandler respond leaves me guessing that there is a cultural background to it. And this is where I get lost. Can you help, oh, Universe of Friends Fans?

Rachel and Monica are in the bathroom deciding who will get the last condom. Ross and Richard are waiting outside. It is awkward. So Ross tries a small talk.  Ross: So were you in Nam? Richard looks annoyed and answers nothing. Audience laughs. I tryed googling the "Nam" word, but it returns nothing that helps getting the joke. Does anyone know what is the "Nam" here?