Since I attended the first Tiana's Supper Club Apr 2018 and also just attended Mar 2019, I'll provide an updated review.
This had almost doubled from $30 to $59, and I understand it went up to $55 Fall 2018. This had increased in price drastically with a greatly decreased experience, and I requested a refund and received half back. Definitely on my "skip it next time" list! This event was so far below expectations that it would be laughable if it wasn't a clear indication of what they think they can charge and then deliver in general...
While they didn't state it up front, this now includes a photo print with Tiana that was taken as you enter (and several people towards the end of the line to enter probably spent 10-15 minutes of this 60 minute event in line for this). You got a full-size old fashioned drink upon arrival with no options available if this wasn't a type of drink you'd drink, and 3 mini martinis. You no longer received your favorite one of the martinis in a full-size like Apr 2018. You received 3 small seafood appetizers and 2 small desserts - I had asked for non seafood which was accommodated but I was given no small fork or skewer to eat it with. Entertainment was the band and the dance instructors doing their best to entertain people by leading some dances that were similar to the stroll where you took turns dancing down the line of dancers, and I'd estimate about half of the attendees were up and dancing - the others were just sitting there. Note that this band and dance instructors were activities that you could do for free during the cruise at other times so not really anything special there. In Apr 2018, they also had the magician entertainer on board circulating to the tables and everyone seemed to either be enjoying couples-type dancing or individual time with the magician. The band left promptly an hour after the event started, and there were also more attendees which mean that some were further away from the music. In Apr 2018, many of us lingered enjoying ourselves for about 15-30 minutes afterwards, but this time we couldn't wait to get out of there. I was with a friend and we got up and danced at the urging of the dance instructors, but the other couple at our table (didn't know them ahead of time, and tables were assigned) didn't enjoy the drinks, the food, or the dancing and they just sat there wishing they could get a glass of ice water to drink but that didn't seem to be available as waiters never checked back at the table at all. They just delivered the food and mini martinis, not even bothering to tell us what it was we were eating and drinking and disappeared.