By SARA VANDEN BERGE   Restoration Advocates is hosting a high-energy event to raise money for Restoration Place, which provides emergency housing for women and children escaping domestic abuse.   Keys for a Cause; Dueling Pianos will take place from 6:30-9:30 p.m. on Saturday, April 11, at Rancho El Burro in Stephenville.   "It's going to be a lot of fun," board president James Gresham told Beneath the Surface News . "They play what the crowd requests with a high-energy, ve