My mental association is of hearing tracks from it played over the PA at the National Film Theatre in London. Saw several all-nighters there 1969-70 and it was often played in the coffee/toilet breaks between films. One of the projectionists was evidently a fan. Sums up that 'early hours still a film to go' feeling pretty well. Plus the disparity between the music and the NFT itself, which still had commissionaires in uniform and a manager in black suit and bow tie.
Don't really have any mental image of it as an album, mainly because I owned the 1971 double LP compilation MGM put out, with all but one of the tracks from it, plus some from their 2nd and third, but programmed in an entirely different order.
Listening to it in its correct order I'm not sure it's a very cohesive album - it points in lot's of different interesting directions, but not all of them fully worked out IMO. A couple of the tracks seem like filler (eg. Run Run Run) and one or two seem a little overproduced (eg. All Tomorrow's Parties). I think the thing I missed not listening to the original running order was way it builds up to 'European Son', which for me is still by far the most interesting track.