Support band The Ray Summers are actually going down well, but lead vocalist Andy Ure is under no illusions - " I know you've all come to see The Bluetones, so we won't keep you long."
And come they have. By the time The Bluetones take to The Picture House stage the place is packed. It's just as well that the gig has moved from the smaller Studio 24 since the publication of the Fringe programme.
"This is quite a turnout," says frontman Mark Morriss, "We weren't expecting that - thanks for bringing a friend". He announces what the crowd already know - "This is going to be a fairly conventional set". This tour is in fact the first time the 1996 debut album Expecting to Fly has been performed live in its entirety, with the tracks played chronologically and a few extras at the end.
Off they launch and by the second number there are fingers pointing and heads nodding, by the third they have a ready made choir and the fourth is performed over a sea of raised, clapping hands.
Looking around I see that it's a more mixed audience than I had anticipated. To be frank, I had expected a lot of 40-something blokes, but the actual range is from 20s to 50s. There are guys in Bluetones T-shirts and one in an Inspiral Carpets shirt with a big number 3 on the back - it looks like there is going to be an Indie / Alternative kick about. There are also quite a few groups of girls - not that this stops the guy beside me doing some serious Dad dancing. I manage to resist emulating him.
Between songs Morriss reminisces about the time of the release of the album, which knocked Oasis off the top of the charts.
"We were the biggest band on the planet - what a five days those were; days I'll never remember".
The live sound of most numbers is not much different from the recordings - only with the added audience chorus, who easily manage the familiar scansion of Putting out Fires wonderful line, "When you're near my heart beats quicker, faster - it's your skin as pale as alabaster".
After the briefest of breaks they are back to do some extras.
"We are going to do some new numbers. Lock the doors!" Morriss orders.
These include one inspired by travels around Scotland and are harmonic, less soaring, more driven and in some ways more conventional. For all their unfamiliarity they are well, if not ecstatically, received.
Predictably there are a couple of real crowd-pleasers to finish. Ironically these are not from Expecting to Fly but from Return to The Last Chance Saloon. The band charge into Solomon Bites the Worm, my Dad-dancing neighbour throwing shapes with abandon.
Bringing the curtain down is If... with the crowd belting out "I ain't getting any younger, but you wouldn't know - so it's on with the show".
"Do you feel transported?" Morriss asks. He is far too modest, as it appears that for The Bluetones faithful this will never grow old.