I think it depends on the level of expertise of the group. Start where they are..with songs you mostly know..Working on the railroad, swing low sweet chariot, drunken sailor. Go from there. Frankly some of the songs mentioned above would have me running for the door. I hate cutesypie stuff frankly and especially anything with hand motions. I hate being told what page to turn to in a book. If someone wants to use it fine, let them find the song and call out the page and start the damn song. Don't wait one second. DOn;t impose the book or sheet music. HGave coies of sheet music handy if someone wants to take it home and learn it. Don't have these awful flourescent lights on so people can easily read the books (especially late at night, especially at music camps I frequent). They can bring flashlights if they need extra lights. Spell it out ahead of time. If you truly hate singing songs like "today while the blossoms still cling to the vine (sort of a canary in the mine song) " tell the people so right up front. If you don't care, say so. But don't say you can sing anything you like and then freeze them out if they do (this happens sometiomes).

mg