Easy Money:
When you save your game, ATMs are restored to their original state, so you can smash them all over again for some quick cash.

Unlockable: Lingerie Costumes
Clear all the side missions and complete the Blacklist to access the Brassiere, Bikini 2, Brassiere 4, and Sarong skins.

Unlockable Characters:

Gina
During Chapter 5, go to both the wharf and warehouse 12. Beat all of the thugs with weapons, then go to the storage room to rescue her.

Jason G
When you're going through Chapter 4, make a visit to the gas station. You'll confront 3 gang members. Beat them, and a cutscene with Jason. Beat him down and he'll join your crew.

Lola
During Chapter 2, beat any of the five Fatimas Saints. Then go to the police station. Lola is locked-up in the cell area. Rescue her and she's yours.

Raven
During Chapter 4, go to southside park. Raven might confront you when you're there. If he does, beat him. If you succeed, he'll join you're party. But you only have one chance to make it work, so fight good.

Norma
Once you pass Fatima's Saints, you'll have repeated confrontations with Norma through-out the game. You must beat her every time in order to finally add her to your team. It will happen after you finally beat her in Chapter 6. She''l call you on your way to the hotel zone, and ask you to meet her at the basketball court. Whoop on her until her pride gauge depletes and she'll join your team.

Gregorio
Clear the game with Raven with a female on the team.