• Loopy Mango is holding a knitting tea party tomorrow night. There will be 10 percent off all yarns, threads, and knitting supplies during the event, which will also feature a demonstration from the store’s owner, Waejong Kim. 78 Grand St., nr. Wooster St.; (212-343-7425). W (6–9).
• Shop for Shoshanna and Letarte swimwear at Olive + Bette’s Mom and Me swim event. 252 Columbus Ave., nr. 72nd St.; (212-579-2178); T (2–5). 1070 Madison Ave., nr. 81st St.; (212-717-9655) W (1–4).
• Vintage designer clothes are deeply discounted at the Society of MSKCC’s spring sale. Brioni shirts are $125, men’s suits are $150 to $350, women’s designer shoes are $100 to $175, and coats by Dior, Gucci, and more are $200 to $350. 1440 Third Ave., nr. 81st St. (212-535-1250); W (10–7), Th–F (10–5:30), S (11–5).