The annual custom of the White House Correspondents’ Association dinner suddenly seems uncomfortable if not untenable: Journalists mingling with Trump administration aides who loathe them, celebrities decrying Trump White House policies, and an entertainment headliner grappling with the tone and boldness of jokes about President Trump himself.

But Samantha Bee is not waiting to see how this year’s soiree unfolds or if those involved decide to hold it at all.

Instead, Ms. Bee, host of the topical TBS comedy show “Full Frontal With Samantha Bee,” and her colleagues are planning a counter-event that will take place in Washington on April 29, the same night as the Correspondents’ Association dinner.

This alternative gala, which is being called “Not the White House Correspondents’ Dinner” and was announced on Monday, will be at the Willard Hotel. Ms. Bee said that it was not an attempt to comment on or compete with that other, better-known banquet, but a night to include jokes about Mr. Trump that she and like-minded comedians want to make.