"If it gets postponed, it is going to make it very difficult for us," Dilbeck told GlobeSt.com. "That's not to say we'll never regain this business, but many of them have very small windows when they can book future conventions. We might not have another chance to go after their business until 2010 or 2014."

Meanwhile, the Hotel Employees and Restaurant Employees Union says if council approves the hotel deal, it may call for a voters referendum. "The hotel projects are an extremely expensive, risky project that voters should have had an opportunity to vote for or against," says Mike Cerbo, Local 14's secretary-treasurer in Denver. "If the city approves this subsidy without addressing the risks, it would be entirely appropriate for the issue to go before the electorate."

While voters had approved the convention center expansion in November 1999, the ballot question did not propose to subsidize a private hotel. But many council members at the time publicly said that the new convention center couldn't go forward unless there would also be a new hotel, which would need to be subsidized.

"What were voters promised? They were told we were issuing debt to build a new convention center, but it would not be built unless it was tied to a convention hotel," councilwoman Cathy Reynolds told GlobeSt.com. "The political promise was that we would not go forward with a convention center without a convention center hotel that would have at least 1,000 rooms. Upfront, we said that would require a subsidy. That is exactly the path we are going down now.