hr_macgirl and I voted in the Massachusetts primary at just before 1800, and were ballots #612 and #613 at our polling location, which was busy but not packed; there were empty booths, of about a dozen total (I think; I didn't count). For the uncontested special election [
ETA: last May] to fill our vacant state Senate seat, we were #22 and #23...and voted sometime around 1830-1900.
As unenrolled voters, we got to choose which party ballot to take, and both of us took D ballots. As we were walking to the booths, we heard the staff say "we need more Democratic ballots".