Benvolio's lines from the opening of Act III, Scene I of Romeo and Juliet, suggest that in that scenario Benvolio and Mercury can meet with the capulets and that encounter can generate a fight between them.
Here below is the opening of Act III, which proves what I said above:
"BENVOLIO : I pray thee, good Mercutio, let’s retire. The day is hot; the Capulets, abroad; And if we meet we shall not ’scape a brawl, For now, these hot days, is the mad blood stirring."