I assume you are referring to the bar whose name was simply Barbiery. I don't recall it ever used the name Barbiery Coast. Was there another bar with that name?
Just as well you did not try to find Barbiery in 2020 because it died around 2002/3. As mentioned some months ago in this thread, for some reason it moved from its Suriwong location to the 3rd Floor of a modern building opposite Nature Boys down the soi from Mango Tree. In the move it totally changed its character. It lost all its charm. The layout was similar to many other bars with a smallish stage at one end rather than in the middle. It also seemed to change from a wide range of boys with a greater number of twinks to one with older heavier built guys. As a regular over many years at the old Barbiery who loved that place, I went twice with a friend to the new premises and we disliked the experience both times. I never returned. I heard it closed less than a year later.
And one small correction to your description of X-treme Bar which as you righty point out opened in Soi Twilight around early 2001, again as stated in post #32 in January 2021. The 'show' was not a regular show. The English bar owner had engaged a group of handsome young dance students to perform kosher dance numbers that were slightly sexy - but no nudity - for about 30 minutes twice a night. I liked that bar because it was different. These boys were excellent dancers and they were happy to interact with customers in between their routines. The bar also had a small number of gogo dancers but I never saw any offed. When X-treme died relatively quickly - certainly by the end of 2002, the dance students were taken over by the German who had the bars on the other side of the soi. That did not last long and they had a brief stint thereafter at Roxy on Soi 4.