By Victoria Wai “Thank you for being with me on this rainy adventure. I feel like this is going to be one of those unforgettable gigs,” and Arlo Parks wasn’t wrong as she headlined this stormy Regents Park Open Air Theatre night. I’ve admired The Open Air Theatre from afar so with a double bill of Arlo Parks and Marika Hackman it was time to be there, we just hoped the weather was wrong as it had been but walking to the venue many raincoats and umbrellas were in sight coming to celebrate 20 years of Transgressive Records, who Parks notes as the label of, “such pure love of music…