These Swingers & Sinners Parties are held every Thursday in a bar in Kings Cross, London.

I'm curious to know if anyone has attended one of these events and what they thought of it.

I'm often in London on a Thursday and was contemplating going along to check it out but I have seen some mixed reviews on other sites and wanted to get the opinion of folk on here.
Particularly as there is an entry fee. I'd love to know if it's worth it!