Saturday 4/15: Protest in support of releasing Donald Trump’s tax returns. Bryant Park, 1 p.m., free. Thom Donovan and Marissa Perel join the Segue Series. Zinc Bar, 4:30 p.m., $5. Sunday 4/16: Tongo Eisen-Martin, Mahogany Browne, and Jive Poetic read poetry. Berl’s Poetry Shop, 3 p.m., free.