Tonight begins another packed weekend at Guild Hall. A stage reading of “The Whisper,” featuring Matthew Broderick, Jane Krakowski, Pamela Adlon, Jennifer Tilly, and Dayle Reyfel reading Eugene Pack’s new work about a girls’ night out weekend, will kick it off at 8. The evening benefits the Felix Organization, whose supporters were adopted as children and now work to enrich the lives of youngsters growing up in the foster care system. Tickets are $30; $28 for members, or, for prime orchestra seating and a V.I.P. reception, $75 and $70 for members.