The pace of retail turnover on Fifth Avenue shows no signs of slowing. However, at 143 Fifth off Douglass, the gentrification tide appears to be reversing: A good old-fashioned barber is going to replace the out-of-business perfume/body potion/candle shop. And right next door, the baby-toy and clothing store Romp is calling it quits after three years. (Romp fans will still be able to get their fix on the Web; the bricks-and-mortar location is shuttering because the store’s owner is moving away.) No word yet on what’s going to replace Romp. GMAP