It looks like the Reid Park Zoo:
http://www.tucsonzoo.org/index.html is more centrally located to the city. Does that sound fine for everyone?
They are open from 9 to 4 every day and there is a lot of parking available.
Admission Fees
$6.00 adults ages 15-61
$4.00 seniors ages 62 and over
$2.00 children ages 2-14
FREE for children under 2 years
It looks like there is a Bruegger's Bagels at the corner of Broadway and Alvernon if people would like to meet up there at 8:00 a.m. for coffee or breakfast.