• Shop for a cause with designer Jodi Arnold and Klaus Ortlieb. Proceeds will be donated to Proyecto Horizonte, a Bolivian village-development program. RSVP to email@example.com. Cooper Square Hotel, 25 Cooper Square, at Bowery (212-475-5700); 5:30–9:30.
• Save 50 to 70 percent off home décor at Housing Works’s Design on a Dime event. Proceeds will be donated to the organization’s new residence for HIV/AIDS-positive New Yorkers. Tickets to Thursday’s VIP sneak-preview event start at $150 and can be purchased at housingworks.org. Through 5/8. Metropolitan Pavilion, 125 W. 18th St., nr. Sixth Ave.; Th (6–9), F–S (10–6).
• Celebrate Brooklyn at the Pink and Black Ball, benefiting the American Cancer Society. Bid on auction items at the event, hosted by What Not to Wear’s Stacy London. Purchase tickets ($275 and up) at pinkandblacktiegala.com. Stage 6 at Steiner Studios, 15 Washington Ave., nr. Flushing Ave., Clinton Hill, Brooklyn; 6:30–11.
• Handbags, shoes, and wallets are 50 to 75 percent off at the Botkier sample sale. Through 5/9. 60 Mercer St., at Broome St.; Th (noon–7), F (11–7), S (noon–6), Su (noon–5).
• Ready-to-wear, shoes, and handbags are up to 90 percent off at the Devi Kroell sample sale. The round-toe python flats are $130 (originally $595), the envelope python bag is $250 (originally $1,790), and the opera jacket is $400 (originally $2,490). Through 5/6. 55 Fifth Ave., nr. 12th St., seventeenth fl. (212-228-3201); W–Th (8:30–7).
• Watches, jewelry, leather goods, and more are up to 75 percent off at the Montblanc sale. Roosevelt Hotel, 45 E. 45th St., nr. Madison, Vanderbilt Suite; W–Th (8:30–5:30).
• Find deals on spring 2010 merchandise at the White + Warren sample sale. The cashmere cable duster is $100 (originally $250), the cashmere cocoon cardigan is $85 (originally $165), and model and pima cotton layering tees are $20 (originally $60). 80 W. 40th St., nr. Fifth Ave., third fl. (212-398-3295); T (1–7), W (8–7), Th (8–3).
• Exotic-skin handbags are discounted at the Nancy Gonzalez sale. 575 Madison Ave., nr. 56th St., eighth fl.; W–Th (10–6).
• Jewelry is up to 60 percent off at Sobral. 412 W. Broadway, nr. Prince St. (212-226-2710); M–S (11–7), Su (noon–6).