When you get into Lumiose City, you will find that you don't have access to various places. Certain things such as the Boutique won't let you in and everything costs a fair bit. This is because you're not considered stylish, but there's a way around it.

Dotted around Lumiose City, there's a variety of facilities for you to use. These facilities all have a variety of functions, but participating in them also helps your style rating, and when your style rating gets higher, you have access to more things. Below is a list on how to increase your style.