Hand over all of your money, walk away, pretend nothing happened.
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No really, just hand over all of your money. We all have guns.
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Fine. See this post. https://www.mmo-champion.com/threads...1#post48883742
Modify it, 20% is expected. If you don't tip, don't ever go back to that place. We remember. Servers do NOT typically split their tips with the cooking staff; you're welcome to tip them separately but it is not expected.
"Places like McDonalds or even grocery stores it is not normal to tip, and corporate policy likely prevents them from accepting." That is true, but law in most US states is that the moment a customer offers a direct service employee a tip, it becomes the property of that employee. The employee can say that corporate policy prevents him/her from accepting, but the corporation cannot prevent it if the customer insists.
Tip jars are typically shared between direct service employees. See above paragraph, it's up to the employees to decide how tips are split.