“Friends” and “Episodes” actor Matt LeBlanc — a Newton North grad — was at Towne Stove & Spirits on Thursday night to celebrate his new Boston Common magazine cover. The issue hits the stands next week.Mark Shanahan can be reached at firstname.lastname@example.org. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at email@example.com. Follow her on Twitter @MeredithGoldste.