score:3
If you can stay in or near the new 'SoMo' area - south of Moorhouse Ave, it's the new vibrant post-quake rebuild area. My understanding is that the are some accommodation hostel / guest house spots open nearby.
If you're eyeing up motels, then Riccarton Road (Riccarton area) - there are lots in Papanui / Merivale as well but that area has been hit harder. There's a mall and lots of restaurants in the area.
Both 'SoMo' and Riccarton have become more focused 'nightlife' areas since the quakes. Riccarton will have more students, while SoMo is a slightly older demographic - late 20s/30s (although depending on events on that night this can easily change).
Upvote:4
I second the Riccarton Road recommendation. Although it's a bit pricey, I recommend the Parkview on Hagley. It will run 150-200 per night but it is well located by bars, restaurants, and shopping along Riccarton. Also, it is adjacent to Hagley park. Take a walk through the park, the botanical gardens, take in a rugby match. On the other side of the park, you are in the CBD and you can enjoy some disaster tourism and check out the Re:Start mall on Cashel street.
Plenty of other motels along Riccarton as well for a variety of budgets. I am not affiliated with the Parkview but stayed there frequently when I was in the process of moving to CHCH. Friendly staff, great amenities, brilliant location.