I threatened to describe my first live Feat experience in my original post. It's only taken two months, but here it is.
Little Feat - Jan. 19, 1975 Rainbow Theatre, London. Their only show in London on the Warner Bros. tour that also featured the likes of Orleans and Tower of Power, with The Doobies as headliners at every show.
Clearly, no one at Warner Bros. realized that there was a substantial and fanatical cult following for the Feat in England, and heads subsequently rolled as a result of this major miscalculation.
The sold out Rainbow turned out to be packed for at least 90% by us Feat freaks - the band never knew what hit them as they stepped out to open for the Doobies. It was an utterly magical vibe, the hall was packed for the opening act (whereas normally half the audience would still be in the foyer), the audience immediately sang along with every song, stayed on its feet and went completely mad after every number, eventually forcing the house lights back down for a third encore!! (No opening act ever does three encores.)
The experience, and the climax - an acoustic Willin' by Lowell - were so intense that people were moved to tears. After the break, once the Doobies started up, people started leaving in droves while they were playing, simply because we were utterly drained and because nothing the Doobies could possibly do could approach what we had just experienced - a sort of collective mass musical orgasm.
To this day, this was the most profound, intense and moving concert I have ever been privileged to attend.