A Foobooz follower on Twitter asked for a happy hour suggestion on Passyunk Avenue. That got us to thinking that we hadn’t mentioned Birra’s new happy hours on the site. Tuesday through Friday from 4 to 6 p.m. all pizzas are half-priced. That means $3 for a cheese pizza, $4.50 Gaaalic and; $6.50 for Mac & Cheese pizza. Looking for something later in the evening, Birra offers a late-night happy hour from 11 p.m. to 1 a.m. with $4 craft drafts, $5 glasses of wine and $6 specialty cocktails.