One guy, let's call him "Gus" jumps from the crowd
and says "you should get a "D" harp because the song
is in "A". I said "thank you", and continued looking
for my harps.
i often have to educate guitar players who try to tell
me what harp to use, instead of what key the song is in.
when i explain that it messes me up because i play in
multiple positions, they usually get it.