Status Quo owe a debt of gratitude to the bar chord. In fact, it has been a mutually beneficial relationship because the Quo have taken the bar chord to new areas.
The mere existence of Status Quo will have meant that many people have had pleasure from playing and / or listening to bar chords, and I am one of those people.
There is something quite inexplicable about a prolonged shuffle in the key of B major, alternating with B6 and B7 with your little finger on the 5th string. If you are lured by the mysterious gravity of bar chords and feel like you are under their spell when the Quo are performing classic boogie rock, then you are a very fortunate. It is something that you will not be able to explain to the satisfaction of those on the other side of the fence.
For those of you that can play the guitar, there are several ways to get the famous boogie bar chord sound from your guitar.
Purely because I mentioned the key of B earlier, and because this seems to have a magic to it, a standard B bar chord would be expressed as 7 7 8 9 9 7. By releasing your little finger to give 7 7 8 7 9 7 you are part way to getting the feel to the chord in the verse of Mad About The Boy off the Blue For You album.
The other two alternating chords that complete the boogie shuffle would be 7 7 8 7 11 7 and 7 7 8 7 12 7. The secret to sounding like the Quo in this track would be to only play a maximum of the 4th, 5th and 6th strings. You may think that this would take something away from the full sound, but with the controlled use of the overdrive, less is most definitely more.
Try it and see the difference between playing the full chord and then limiting the strings that you strum.