I’m going to a charil xcx concert pretty early, is there a place where I can wait inside the building or do I have to wait outside the building ?

There's a chill bar connected to it in the back where you can wait. Pool tables and stuff. They'll prob mention it as well

The bar beside it is a nice place to wait at

Usually there are opening line ups before the main event so you're free to walk in early. There are bars to keep you entertained til the main show plus you can step in and out when they stamp you!