Q: If your organization has more than one chapter or location, should you keep all of your opportunities under one main organization account, or register a separate account for each location or chapter?
A: It's all up to you.
Some organizations prefer to have administrators from multiple locations posting from one main organization account.
Other organizations prefer for each location to have its own organization account.
Since the location for an opportunity is associated with the opportunity itself and is separate from the organization account address, it's possible to recruit for locations in different cities or even states under a single account. If your organization has only a few chapters or locations it may make the most sense to keep all of your listings under one account.
One potential drawback to having all opportunities and administrators from all locations on the same account is that administrators will get account-wide system notifications about opportunities that aren't related to their location. When an opportunity is about to expire, we send an automatic notification to every administrator on the account. Additionally, if you plan on posting many opportunities with similar titles but different locations, it may be difficult to differentiate the opportunities from one another in your organization's dashboard. This can be remedied by making some reference to the opportunity location in the title; instead of 'Awesome tutors needed!' you could title it 'Awesome tutors needed in Seattle!'
If you think your administrators won't mind getting expiration notifications related to opportunities in other locations, and you aren't planning on posting dozens of opportunities, then it may make the most sense to have all the locations post from the same organization account.
However, basic organization accounts are free, so if you would like to keep your locations separate, you are free to create as many accounts as you need to serve your purposes (as long as you don't have more than one account for the same location).