The outdoor theatre is 30, flirty and thriving as it stages Romeo and Juliet. When curtain time finally arrives for Shakespeare By The Sea’s opening night performance of Romeo and Juliet (one of two shows that comprise the veteran theatre company’s 2023 summer season, which is also its 30th), associate artistic director and play director Drew Douris-O'Hara will be ready, primed, equipped, toes already waiting behind the metaphorical start line: “I think I've probably seen 30 productions of Romeo and Juliet in the last decade. It's my favourite…