 Greenwich Historical Society has music on the Great Lawn every other Thursday. Probably would like to have it tonight, but it's not till next Thursday night. The 25th, 6.30 till 8, and it is old school 203 rock and roll like it used to be. Site opens at 5.30, 6.30 till 8. A Norwalk-based rock cover band covering all the classic oldies. WGCH, your center time, 720.