At every gig I went to over the weekend the band asked the audience leave or remain.
Total audience at all three events would have been circa 700 / 800 and it was pretty much 100% remain.
But there would have been both peer pressure, and, as Mooney mentioned, it's a fairly self selecting sample when you're at a folk gig raising awareness of the plight of the Guatemalan organic water vole or whatever.
I've driven through Hampshire today, it is voting to leave. Or at least, every retired accountant with a pretty house in a pretty village is voting leave.
Now, who's more likely to actually give a folk and vote on the day, retired folks, or trendy young folk folks.....