... elision by patrick ...
I don’t think there is such a thing a 'authentic' tempo range if you are
referring to setting crotchet/quaver/minim tempo speeds.
What you are asking, it seems is, 'what speed is 'cheerful''?
Which doesn't makes much sense.
I expect it was simply played 'cheerfully' and that would depend on who was
doing the playing. Also can you be sure that the same tune played in one 'Irish
pub' is any different from a 'non-Irish pub' or that other 'Irish pub' down the
road? The music is probably played as fast or slow as the musicians play it and
that can depend on how many times they have played together, the smell of the
crowd or simply the number of pints of the 'black stuff' they have put away
before/during the gig. ;) 110201-000063
Sorry if that sounds a bit flippant, but I am not sure what kind of answer you
are going to get other than someone else's guestimation of which you could do
yourself.
Tempo in terms of words (rather than beat numbers) is more about feeling than
speed.