Dana-Farber’s UnMask Cancer, Saturday, Oct. 20, at the Mandarin Oriental, Boston. This exotic rainforest-themed party benefits Dana-Farber Cancer Institute and the Jimmy Fund. The evening will feature dinner by-the-bite, creative cocktails, dancing, a live and silent auction, music by DJ Joey Carvello, and more. Cocktail attire is suggested, and masks are encouraged. Tickets start at $350. Visit www.unmaskcancer.org for tickets and sponsorship information.