Using 1 main site for many branch office locations

[ilyaelbert]

I have 1 main site with many many city/state pages within the site. I would like to use this site as the 'website' on the google local places pages for all my branch office locations, however I am worried that if my domain authority isn't high enough for the site, google will think I am spamming 'google places'. Are there any best practices I can follow to do this? Ideally I would like my blended search to show

www.site.com/boston

---

not as

www.site.com

[elephantseo]

1. Make sure you have unique content (phone number, hours, address) on each city URL you want to use, pictures are a big plus.
2. Use the bulk upload, see https://www.google.com/local/add/g?hl=en-US&gl=US#uploadfeed. Before you submit make sure to read, http://www.google.com/support/places/bin/answer.py?answer=178024 and http://www.google.com/support/places/bin/static.py?page=guide.cs&guide=28247&topic=28291&answer=173669
3. Make the name in your bulk upload spreadsheet unique for each location (Business Name - City, State)
4. Use the store code field which uniquely identifies each location of your business
5. Fill in as many of the "optional" fields as possible that make sense for your business
6. Use a different phone number for each location
7. Use a unique description for each location

Those are my 7 top tips; I'll add more if I think of any.

Two other options that may help but I have no real experience/proof on is advertising your locations with Google Boost  and Google Tags. If you are legit & spend money you may be able to get your account rep to coughhelp/pullstringcough