Warehouse live questions

I need answers from people who actually frequent there rather than customer support or a robot- is it still where it’s listed online as the concert “starts at 7” and openening acts really go on from like 8-9 then the actual artist goes on at 10?? I’m trying to take my girlfriend to see her favorite artist but with everything lined up for the day we’re GOING to be late- I wanna make sure we get there about when the headliner goes on stage, any advice??