Out this month, “Meet the Regulars: People of Brooklyn and the Places They Love” is Joshua D. Fischer’s debut book, and the first to come from Bedford + Bowery. Here’s a new installment of the series.What is “pole fitness”? Isn’t it an exercise fad for bored midwest housewives? “Hopefully it will be one day,” says Karimah Gottschalk, an advertising resource manager by day and pole dancer by evening. “That’ll be the trickle-down effect of it becoming non-stigmatized.” With a thriving competition circuit, the mainstreaming of pole fitness may already be on its way.