[itsme]

@Mike: I would prefer that the song title color applies to every place where a song appears in a list: Setlists, Songs, Collections...

@Wendy, Geoff: having a separate collection (or maybe a Genre) for separators seems more flexible to me than tweaking the title.
Learning to use filters is worth the effort. Applying stored filters is very flexible and convenient.
I have stored filters for eg.
preparing setlists: include Collection "Band A", include Collection "Separators", exclude Genre "XMas"
all "true" songs except christmas songs: exclude Genre "XMas", exclude Collection "Separators", exclude Collection "Tips+Tricks"