It matters not what the place is called on the outside...swingers club, private club, gentlemen's club, lapdancing club, nightclub, sauna, massage parlour, escort agency, etc. it is what goes on inside that defines it as a brothel in legal terms...i.e. more than one woman offering sex with or without charging.
I'm sure if the Police wanted to raid such a premises they would easily obtain the necessary warrant. I highly doubt that any licence the premises has would allow it to operate as a brothel (women offering sex), as that is illegal.
All these places are tolerated by the authorities until the day they deem them to be undesirable, then the full force of the law can be brought down upon them. Thankfully Police seem pragmatic and tolerate many premises of this type of indoor prostitution and seem to concentrate resources on the more anti-social expressions of prostitution, such as street prostitution, underage prostitution and sex-trafficking operations.
Of course, punters and prossies are committing no offence by being at a brothel, unless it is found that girls are underage or being co-erced into offering sex. The management and staff at these places are very likely committing the offence of keeping or assisting in the management of a brothel.
Which then leads to my original question...why are these two places asking punters to submit real ID details when there are other brothels all over the country that will allow punters to visit anonymously??