CRAB CRUNCH Christopher Letts and Tom Lake of the Hudson River Foundation provide demonstrations on how to steam blue crabs, as well as how to crack them open and eat them, as part of the River Project’s sixth annual Crab Crunch. The event also includes a presentation on the natural history of the blue crab and how fisherman catch them, along with complimentary boat rides on the retired police launch Big G. Saturday, 3-6 p.m., Pier 26, Hudson River between Chambers and Canal streets, 212-233-3030, free samples provided.

RED, WHITE, AND SPICE Sommelier Joshua Wesson sheds light on pairing wines with the rich flavors and spices of Indian cuisine at Diwan. The sit-down dinner and wine tasting are sponsored by Asian Women in Business. Monday, 6-9 p.m., Diwan, 148 E. 48th St., between Lexington and Third avenues, 212-868-1368, $75 general, $50 members, reservations required by tomorrow.

To submit an event for consideration for the Calendar, please wire the particulars to calendar@nysun.com, placing the date of the event in the subject line.