Hours on Thursday night?

As mentioned, the Fillmore doesn't have specific hours. However there is a noise curfew during the week so typically shows don't go too late. Asking about hours makes me wonder if you're instead curious about the Music Factory as a whole; it is a conglomeration of many different businesses each with varying hours including multiple other music venues, bars, clubs, and restaurants. See the Music Factory site for more info (avidxchangemusicfactory.com)

The Fillmore is a theater so they have events. They don't have specific hours. Most shows start at 7pm or so. You just have to check their calendar to see what's going on each night.