Tim, using a 'tuning aid' probably makes no difference - (a) they are frequently inaccurate, and (b) even if they're accurate, they will only check the frequency each individual string's vibrating at, they won't make any allowance for Temperament (which is too complicated to explain here but I'll tell you about it next time I'm at MRFC). It's usually these small adjustments for Temperament that are made in the 'second tuning'.

Also, many of us (and I'm definitely one) enjoy the explanations about the songs, the anecdotes, informal chat etc., and regard them as an important part of the performance. It's one of the two important differences between folk clubs and open-mike-nights (the second being the Folkies' preference for in-tune guitars!). :-)

Cheers & Beers M'Dears,
S:0)