The DNC is avoiding paying taxes on gas since they are using the city’s pump:

The committee hosting the Democratic National Convention has used the city’s gas pumps to fill up and apparently avoided paying state and federal fuel taxes.
The practice, which began four months ago, may have ended hours after its disclosure. An aide to Mayor John Hickenlooper released a statement Tuesday evening saying that Denver 2008 Host Committee members would pay market prices for fuel and would also be liable for all applicable taxes.
[…]
“There’s something there that just doesn’t seem right to me because, in a sense, you’re saying then that the officials who pass the laws are not willing to live by them,” said Councilwoman Jeanne Faatz.

It wouldn’t be the first time that happened and I’m sure it won’t be the last. Laws are for the peasants not the ruling class.
Of course they aren’t trying to avoid paying taxes by using the city pumps, they were using them for safety reasons:

“We know the gas is not tainted,” he said. “We use it as a safety and security measure.”

Kind of insulting to the gas station owners in Denver, don’t you think? Is this a known problem with the gas in Denver?
The citizens of Denver might want to check for anymore freebies they’re subsidizing for the Democrat convention. This is probably the tip of the iceberg.