Source: Katherine Barrell — Instagram
Elisa goes into the movie theater under her apartment and finds the creature watching the film.
Source: Toronto.com (archived)
Vanya practices her violin on stage in an ornate theatre in episode 1x01 "We Only See Each Other at Weddings and Funerals". Vanya performs her solo in front of a sold-out theater and her siblings arrive to try and stop her from destroying the world in episode 1x10 "The White Violin".