The musical ‘Urban Cowboy’ opened Thursday to bad reviews. On Frida, producers decided to close the show Saturday. Then changed their minds on Saturday. “For the better part of Broadway’s history, shows regularly closed after one or two performances. In recent times, however, it has been highly unusual for a Broadway musical to close in one weekend, no matter how damning the reviews. Even shows with scathing notices, like this season’s $12 million flop, ‘Dance of the Vampires,’ can eke out a few weeks and have enough cushion money to run television advertisements to fight reviews.”