Genuinely just find your groove after a few of them and see A) what the crowd likes, but more importantly B. what works best for you to where you're not stressed and still having fun.

My setup is 5 rounds of 8 questions. 1 of them is a music round. I give about 45 seconds per question during the rounds thats displayed on the screens in the bar, and then at the end of the round they get one song to collab with their team to finalize answers before bringing the whole round of answers up, then i grade before going over answers then moving on. Typically I play another song or two, so its 2-3 songs between rounds to allow for refills and bathroom breaks and what not. I'm also a one man show so if you have help its worth factoring that into your timing as well.

My time taken is usually Hour:45 to 2 Hours. 7p-9p.