starving in the desert. Get lost, hood!" When Dally returns with the beverages, Cherry angrily throws hers in his face, while Marcia is happy to drink her own. Seeing the girls' contrasting responses to Dally's behavior makes Ponyboy realize that the two are not alike:

Cherry had said she wouldn't drink Dally's Coke if she was starving, and she meant it. It was the principle of the thing. But Marcia saw no reason to throw away a perfectly good, free Coke.

Cherry actively addresses Dally's behavior, unlike Marcia, who ignores him. Cherry is true to her word and does not accept Dally's offering on principle, while Marcia does not hold a grudge and is happy to enjoy her Coke, regardless of who gave it to her. Cherry is proud and values integrity, while Marcia is laid-back and passive.

The sequence that the question is asking about occurs in chapter two.  Ponyboy and Johnny meet up with Dally at one of the town's drive-in theaters, and the boys quickly take notice of two attractive Soc girls.  The girls are Marcia and Cherry. 

Dally doesn't hesitate at all before going up to the two girls.  The text says that he took a seat right behind them and started talking "dirty" and loud enough for the girls to hear.  It must have been pretty bad because Ponyboy says that he felt his "ears get hot."  Ponyboy is in a gang that isn't opposed to "colorful" language, so the fact that Ponyboy finds Dally's words bad enough to be embarrassing means that whatever Dally is saying must be bad.  

The girls do an admirable job of ignoring Dally, which just serves to antagonize him.  He ups his bravado and attention grabbing behavior by placing his feat on the back of the seats that the girls are sitting in.  That finally gets the girls' attention.  They turn around and tell Dally to knock it off.  They aren't kind about it either, and they let it be known that they aren't surprised at such behavior from a Greaser. Dally just rolls with it and continues to act the tough, bad boy part. 

"Oh, my, my"—Dally looked bored—"you've got me scared to death. You ought to see my record sometime, baby." He grinned slyly. "Guess what I've been in for?"

Dally offers the girls a drink and gets a great response in return. 

She was mad by then. "I wouldn't drink it if I was starving in the desert. Get lost, hood!"

Dally then leaves; however, he does eventually come back with some Cokes for the girls. He's completely confident in his tough guy persona, his good looks, and the Cokes.  Cherry, apparently, still isn't impressed.  She takes a Coke and pours it all over Dally and again tells him to get lost. He ignores the request, but is convinced to leave once Johnny speaks up.  

Based on this single encounter, it really looks like Dally has zero future chance with Cherry; however, Cherry admits in chapter three that she is definitely attracted to Dally's good looks, self-confidence, and bad boy image.  

She looked at me quickly. "I could fall in love with Dallas Winston," she said. "I hope I never see him again, or I will."

Ponyboy's approach to Cherry is completely different.  He stays quiet until Cherry talks to him. 

"Y'all sit up here with us. You can protect us."

Perhaps it's because Pony knows that he is younger than Cherry, or perhaps it's because he's just not that experienced at talking with girls, but Ponyboy never makes an attempt to "hit on" Cherry or Marcia.  He talks to them like people who happen to be female instead of females that are meant to be conquered.  Cherry immediately notices this difference and even mentions it.  

Johnny grinned. "How come y'all ain't scared of us like you were Dally?"

Cherry sighed. "You two are too sweet to scare anyone. First of all, you didn't join in Dallas's dirty talk, and you made him leave us alone. And when we asked you to sit up here with us, you didn't act like it was an invitation to make out for the night."

Dally's approach treats the girls like they are objects to be won and used, and Cherry firmly rejects him.  Ponyboy treats the girls like people, and Cherry and he become close friends that end up sharing a deep, emotional connection.  

Dally thinks of himself as quite the charmer.  He is handsome and he knows it, although he is a "Greaser" and none of the Soc's "girls" will date him.  His approach with Cherry is forward and abrasive and Cherry rebuffs him, although it is clear she is attracted to him.  Ponyboy is shy and withdrawn and is awkward around girls, especially ones he finds pretty.  Pony would never be forward with a girl that was "out of his social class." 

Cherry is attracted to Dally, but because he is abrasive and very forward (and experienced), she rebuffs his advances (and she also does this, of course, because they didn't date "Greasers").  The Soc's and the Greasers simply didn't date each other. The social divide was very clear.  Cherry is a bit softer with Ponyboy because she knows he is very naive and innocent, in many ways.