The sentence says "The" table; hard to pick up, but I believe this indicates the table as the topic of the sentence.
I think a better translation is "On the left and right side of the table there are chairs"
If you didn't know this already; in school I learned the abbreviation T.T.P.O.V.
Topic (は) Time (に) Place (に) Object (を) Verb. Of course, things get a bit more complex with particles like が, however, most sentences follow thins basic structure.