ATLANTIC CITY, N.J. (AP) — Atlantic City’s main casino union is asking groups that have booked conventions at the Tropicana Casino and Resort to take their business elsewhere as a labor dispute between both sides grows more contentious.

Local 54 of Unite-HERE says it has asked 30 groups to cancel bookings at the Tropicana to protest the casino’s intention to terminate pension plans for its employees.

The Tropicana declared an impasse in contract talks last month and said it will unilaterally implement its final offer, which includes an end to pension contributions. The casino wants to give that money to workers in a cash payment or to their 401K accounts.

The union used the convention-targeting tactic to great effect in a labor dispute with Resorts Casino Hotel last year.

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