No wonder Danny O'Reilly says The Marquee is his annual highlight.
"This is my favourite place to play," he says to volleys of adoration. "I've said that everywhere I'm asked. This has been our favourite gig every year for the past six or seven years."
The feeling is clearly mutual. Thronged for one night last year, sold out to busting point for two nights this weekend.
The venue and this audience seems like home to them. Even their mistakes are adored.
"We haven't played this one in a while," says Danny, launching into the aptly titled This Is Not A Test. Something goes wrong. He stops. "I told you we hadn't done it in a while."
Yelps for the newer hits: The Long Way; What A Love; and Get Loose.
A real encore highlight was a cover of Fleetwood Mac's The Chain, with warm-up acts Roisin O (Danny's sister) and The Academic back on stage.
This is a very animated young crowd, dreaming of further Euro 2016 joy, singing Olé Olé at every gap. Danny & Co laugh along.
"We'd like to dedicate this next song to Robbie Brady," says he, and sure why not indeed?
Some years ago, the Olés were enough to send Prince home sulking from Páirc Uí Chaoimh.
Not these lads. Five modest stars delivering a real five-star show.
Big treat ahead for those with tickets to Saturday's sold out show. Hope they do the big bed sheet / curtain opener. A real piece of low rent theatrical genius.
Roll on next year.