The Irenic is located in North Park at 3090 Polk Avenue. Parking is tough immediately around the venue, but if you park on 30th or University, you'll only walk a couple blocks to get there.
Please keep in mind that this is an ALL AGES show in a residential area, which means the whole thing will probably be over by 10 or 10:30. I can't tell you how many people showed up late for The Rapture only to miss most of their set. Doors for Friday night are at 7 pm, so you can expect the music to start shortly after that. If I can get you set times before Friday, I'll tweet them or update here, but just plan on being there early.
Tickets are $12 and can be purchased here.