We have spent many a night at the Crescent Ballroom, scarfiing down burritos, after dancing to rock and roll bands. We don't know how they make their burritos so delicious. Go try one for yourself (and maybe see a band).
The Desert Botanical Gardens is one of the prettiest places in all of Phoenix. Paul and Diane have spent many afternoons wandering around the grounds. Go for a morning or evening stroll if you can, when it'll be the coolest outside.