Ron D, I agree about RUS.

It is very hard to use "the blue book of death" as an unobtrusive 'cue card', because the type is small and the format is such that it's very hard to GLANCE occasionally at the page to refresh your memory in case of a brain fart (or when there's a verse you never learned.)

People using RUS do tend to have their head buried in the page.   
Plus RUS has many non-standard versions of lyrics and/or chords, in addition to outright errors.   Aside from all else we've said about the pluses and minuses of printed 'crutches', I hate singing from "the blue hymnal" because my version of the song -- whether "the correct one" or merely one of many variations -- is likely to be different from what's in the book.

Although many people and groups use it, I really don't think RUS was intended to be read from regularly in song circles. It usually has good info on the source of songs and it can be a great aid to adding songs to your repertoire, but it's far better as a research resource than as a hymnal or substitute for big-print lyric sheets or sheet music.