It was first opened in 1848 as a music hall, and by 1912 it had been renamed the Mile End Empire and was being used as a cinema. By 1921 the Empire was owned by A. Goide & Partners who operated several East London cinemas. It's been through many incarnations since then, operating for some time as the ABC Cinema. Today, it retains its large auditorium, which is particularly large and is an atmospheric place to watch a film.
Films vary in price, but tickets start at around £5.50, which is very reasonable in your author's book. For full details of upcoming screenings, see http://www.genesiscinema.co.uk/