With a startup business in a hotly competitive neighborhood,
Rick Koerner can't afford to lose any customers.  But that is
what's happening to Koerner and his Stack Subs sandwich shop in
Lakewood after two days of the federal government shutdown.
Koerner and other business owners around the Denver Federal
Center said they already are seeing a negative impact from
furloughed government and civilian workers.  Koerner estimates
he has lost about 5 percent of his normal business since the
shutdown began Tuesday.  "That's not huge, but we've felt it,"
he said. "It's a thin-margin business to begin with."  The
1-year-old Stack Subs, on Union Boulevard, just west of the
Federal Center, competes against two nearby Subways, a Jimmy
John's, a Jason's Deli and a Firehouse Subs.  Also witnessing a
business loss is Paradise Cove, a bar and restaurant on West
Alameda Avenue, just east of the Federal Center.  "We're not
getting our regular lunchers," said owner Deborah Giovingo. "I
think they're really trying to conserve t