I too have been at the 50s Prime Time solo several times (but always at lunchtime). The servers have always been very pleasant, but they've never instigated any shenanegans with me. However, when I asked about "How did Grandma do with her pot pie today?", then asked another waiter for a glass of water when I couldn't locate my waiter, they started teasing each other, not me, and put on quite an amusing show. It's one of my favorite solo dining spots.