We love music too and go to all kind of concerts but I still don’t see such behavior as common. I think it might be not as much as loving live music as people using substances that help to lose inhibition. I suspect people are intoxicated (well I mean buzzed or even drunk) and perhaps high as well. I suspect when these people are sober, they act appropriately.

You may have fixed the issue with that woman but you can’t fix it with everyone else. You said it’s ongoing issue and it’s not one woman.

I don’t think it has anything to do with how you two look or level of attractiveness of your boyfriend or that you two are taken. It has everything to do with how people act when under the influence. It is just what it is. No point to even worry why they don’t respect you or your boyfriend. They just aren’t sober.