Can someone please help me some questions about Babylon Sauna.

I am only really interested in weekends and Friday evenings.

What times are the various different parts open?

Is the new underground zone open every day? The website says open 28 October...does that mean permanently? Or just that day and other odd days not mentioned? I seem to remember some very odd rules about its opening times.

Why does it call it the new underground zone....has it been refurbished?

What are the evenings like when there is nothing special on? What time is it worth staying until?

The website is not very helpful..seems to concentrate on selling accommodation only.