If this restaurant is having money coerced out of them by a bad organization, all the more reason to shop there.
lav davka.
If the chovevei mafia is going to use this restaurant as an example when “marketing” to the next place, you’re just helping the reshaim.
The whole idea is literally laughable. If they actually want to give money to restaurant workers–let them just give money to those workers! If customers want to give money to restaurant workers when they dine there–give money to those workers!
Liberals excel at taking money from other people for their causes, but proof is in the pudding that they never open their own wallet.
If you’re dining at a restaurant and think you’d rather pay 10 dollars more for your meal and have the kitchen staff paid more, just hand the maitre d’ a 10 (together with a tip for her) and ask her to give it to the kitchen staff.