If ever a set more intuitively captured the strengths and defects of a play script's construction than the one built for John Pallotta's Jane Ho, now playing at the Lion Theater at Theater Row Studios, I haven't seen it. A plush boudoir replete with lighted mirrors and velvety reds sits beneath a spare, back-lighted bedroom, with only a curved, lushly carpeted staircase to join the two. As attractive as they are, designer Gregg Bellon's interiors are appropriate for being just that, interiors. Entering the world of the four anonymous sex workers at the heart of Pallotta's work is like slipping on earmuffs