Ganymede Arts’ “Naked Boys Singing” What you see is what you get in Naked Boys Singing, a show with a title that’s cheekily literal being staged by Ganymede Arts (making a welcome return to full-scale productions) at 1409 Playbill Cafe. But it’s also a show that eschews Chippendales-style titillation, casting attractive but not unrealistic looking men as its five singers, who belt out tunes that wink and play around with penis puns, for sure,…