The Gateway Men's Chorus will not give in to the darkness of this year. Instead, the group fights back with a program of songs dedicated to life in the midseason concert of its 30th year, Light. "Community" and "courage" are the watchwords, as the chorus joins forces with soloist Christine Brewer and two additional choirs (the Council Oak Men's Chorale of Tulsa, Oklahoma, and the Lindenwood University Men's Chorus) to perform the music of Verdi, Radiohead and Florence and the Machine. Also on the bill is Randall Thompson's Testament of Freedom, which underlines the ongoing fight for LGBT equality by joining the struggle to the words of the founding fathers. The chorus also has the privilege of debuting a new work in Eric Lane Barnes' composition that satirizes the cruel stupidity of North Carolina's bathroom bill. The Gateway Men's Chorus celebrates Light at 3 p.m. today at the 560 Music Center (560 Trinity Avenue, University City; www.gmcstl.org). Tickets are $15 to $25.