Join us at the Eastern Branch! Widescreen, comfortable seats and popcorn too! Thursday afternoons starting at 2 p.m. Movie synopses from imdb.com.   May 10: Pitch Perfect (2012, PG-13) Beca, a freshman at Barden University, is cajoled into joining The Bellas, her school’s all-girl singing group. Injecting some much-needed energy into their repertoire, The Bellas take on their male rivals in a campus competition.   May 17: Table 19 (2016, PG-13) Eloise, having been relieved of maid of honor duties after…