I guess I would use a table BusinessSitesPeople with just two fields, SitesFK and PeopleFK that will act as the nexus between both tables
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges