The story is only going to get worse as more information comes out in the next few days.
This is an account from someone who saw people dying and tried to stop the concert, only to be told "gtfo, we're tryna make money here" as people scream for their lives, and drop dead, around her:
https://twitter.com/speedyred711/status/1456913478879432704?t=e3FXNhHrW83rCACeThNQsw&s=19
Here's a vid of her hopping on stage:
https://twitter.com/helowkeyspittin/status/1456893054384844802?t=L9gZT-DcOgw1huq9NizhuQ&s=19
I also present videos I gathered from Twitter. Some of these are NSFW, and include medics giving CPR to people who are passed out and/or dead:
https://twitter.com/LinaHidalgoTX/status/1456884063768301569?t=EywCKtXWqHGDWS8ezxFMLw&s=19
https://twitter.com/helowkeyspittin/status/1456891027130880000?t=PUoHs5_YEC1BogJLGztcAg&s=19
https://twitter.com/redblacc/status/1456919916926361608?t=gZG8dJGaBOYGzYNOyHXItg&s=19
https://twitter.com/ChaudharyParvez/status/1456918853800267776?t=WE4GVH23zimZN81zn0iqXg&s=19
https://twitter.com/LMFireSystems1/status/1456893701834293254?t=rG8HAPUNl93uIVxiLtO5Qg&s=19
https://twitter.com/helowkeyspittin/status/1456895045894803458?t=rj6EbBBkvDHCOa4t8QStbw&s=19
https://twitter.com/mvmo___/status/1456870414530064385?t=iGY1TCjCdUyewVJZPynG9w&s=19
https://twitter.com/cozyboycutz/status/1456888060944203776?t=ZIPpvObRfsA96NLGhWQe1A&s=19
Depends on the concert. I don't actually go to any myself (I think I've been taken to some as a kid by my parents, but I only have vague memories of that), but I've watched/listened to some concert recordings (proper ones, where the band actually has a professional recording setup), specifically of a few jazz fusion bands I like, and the live performances are definitely a different experience. I guess jazz is particularly suited to this as a genre with emphasis on improvisation though, perhaps this wouldn't really apply for all genres.
And a jazz crowd would probably be too small to crush you.