I'm sorry i don't understand your question completely but i will give you my most adequate and accurate answer. the style that has evolved into todays style is the style of the 70's and 80's. People...
I (personally) am a sport chic style. It's real in right now (FYI). There are many styles! There is T-Shirt and I-could-care-less (but no one, no one will ever make it through high school with that...
If by "service style" you mean "community oriented" then yes, those would be three styles (altho in other texts they are sometimes described differently).