• The Society of Memorial Sloan-Kettering Thrift Shop celebrates its fall opening, offering menswear, womenswear, designer shoes, handbags, and more. Hermès ties are $75 to $85 (originally $170) and scarves are $185 (originally $375). Through 8/15. 1440 Third Ave., nr. 81st St. (212-535-1250); W (107), ThF (105:30), S (115).
• Stash Consignment hosts its first summer sale. Find merchandise from labels like Balenciaga, Chloè, Dolce & Gabbana, Thakoon, Prada, Peter Som, and more for up to 75 percent off. RSVP to firstname.lastname@example.org. Through 8/12. 1182 Broadway, nr. 28th St.; 117.