Forget about how the Search Engines see this for a second and think about how a potential user sees it. Play the customer. Pretend you are them. Are you them yet? Good, let's proceed:
Look at these two results and decide which one you want to click:
Internet Marketing Company | Denver SEO | Brand Name
Internet Marketing Company|Denver SEO|Brand Name
Bet I know which one you chose.
Don't stuff! Take care with your titles! Titles are the single most important aspect of your digital marketing campaign! This is the first thing that a potential customer will see when coming to your site. Make them want to click it!