• Meet America's Next Top Model judge and runway coach J. Alexander as he celebrates the launch of his new book, Follow the Model. Barnes & Noble, 97 Warren St., at Greenwich St. (212-587-5389); 7 p.m.
• Meet actress and singer Ashley Tisdale at Sephora. The first 300 Beauty Insiders (sign up for free at the store) to attend will receive a gift bag and a $10 Sephora gift card, and two customers will win a $500 shopping spree. RSVP to firstname.lastname@example.org. Sephora Fifth Avenue, 597 Fifth Ave., nr. 48th St. (212-980-6534); 6–8.
• Cashmere V-necks, crewnecks, and turtlenecks are $85 (originally $220), cashmere tees are $50 (originally $125), and cashmere scarves are $80 (originally $175) at the White + Warren sample sale. Through 11/12. 80 W. 40th St., nr. Fifth Ave., third fl.; T–W (8–7), Th (8–3).
• Silk dresses are $120 (originally $372), bombers are $140 (originally $350), and skirts are $90 (originally $310) at the Lauren Moffatt sample sale. Through 11/12. 214 W. 29th St., nr. Eighth Ave., Ste. 1503 (212-465-0839); T–Th (9–7).
• Merchandise is up to 70 percent off at the Hugo Boss sample sale. Women's leather jackets are $299.99, women's shoes are $99.99, men's suits are $399.99, and men's dress shirts are $59.99. Through 11/14. Soiffer Hasken, 317 W. 33rd St., at Eighth Ave. (718-747-1656); T–F (9–7), S (9–5).