Unions Vie for Turf on New Broadway Fronts by GORDON COX
With the recent openings of the rock-ballet "Movin' Out" and the spoken word anthology "Def Poetry Jam," not to mention the upcoming and unprecedented appearance of an opera ("La Boheme") on the Great White Way, the definition of a Broadway show keeps loosening and expanding. That means, of course, that there have been a few growing pains.<br /> <font size="1" face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" color…