Website "turnkey" for a sports school

This is a website for a volleyball school. You can sign up for classes in different groups and levels. There are several levels, by registering you can attend groups of the first and second levels. There are classes for corporate groups, for VIP groups. The site has a large and convenient calendar where you can see which groups are busy, which are not, which coach will lead the class, at what time, and there you can also sign up for classes.