Live Oak Singers present It’s Showtime! Songs from Stage and Screen Madison Square Presbyterian Church, 319 Camden Street 7:30 p.m. Saturday, May 16, 3 p.m. Sunday, May 17 $20 General admission, $15 Students, military & seniors Children 10 and under are free Last summer, I attended the Pride concert rehearsal of the then newly formed Live Oak Singers, San Antonio’s only…