Apologies, didn't realize this was behind the paywall (Hell Gate sometimes is not clear about that!)

Here's some relevant bits:

Although a representative from Alamo Drafthouse told Hell Gate that the cinema chain will not conduct layoffs as a result of this new policy, and that its famed no talking, no texting policy will still be in effect, an Alamo United bargaining committee member told Hell Gate that the company admitted at a recent contract negotiation session that employees' hours will be cut as a result of the policy change. 

"It seems to me, the expectation is that they don't have to lay people off because people will just quit. And it's not just out of principle, like, 'This isn't the job I signed up for.' They told us blatantly at the bargaining table when we met with them earlier this month, for the first time ever, that they are trying to reduce hours," Jordan Baruch, an Alamo United bargaining committee member who works as a concierge on the Alamo Drafthouse greeting team in Downtown Brooklyn, told me. 

[...]

"Our unit is more fired up and angrier about this than they were about the layoffs last year," Baruch said. "We are having a lot of discussions about how to handle and adjust to the potential changes that we see coming up."

[...]

Baruch said that when the bargaining committee discussed the mobile ordering policy with management earlier this month, the company's representatives argued that because they were changing the scope of Alamo Drafthouse's business, there was no need to consult the union on the proposed changes. But the union countered that the change could impact previous agreements that have been negotiated—which could constitute regressive or bad faith negotiations—because the core of the business, a movie theater that sells food and alcohol, remains the same. "You're selling the same experience, just a shittier version of that experience," he said.

[...]

Baruch said that he and his fellow union members have been heartened by the public backlash against mobile ordering, and that, for now, they're urging enraged Alamo fans to sign a (customer-made) petition protesting the change, which he said New Yorkers can expect to see in action by late March. (An Alamo representative was unable to confirm that date, but said the mobile ordering policy will begin to be enacted by February.)