First arrived in Thailand in 1962 aged 21. Nana Plaza was a relatively late development, and never had the amazing atmosphere of Patpong in the mid 70s to the mid 80s, when the original Queens Castle was in full swing on Patpong 1. I suspect there will always be some sort of nightlife on Sukhumvit/Nana and Patpong but it takes Europeans an Americans interacting with Thai girls, enjoying drinks, music and a lot of laughs, to create the fun ambience which is sadly lacking these days.