The Adventure of the Silver-Headed League

It all seemed perfectly reasonable. He would be paid a significant sum for each evening or event he spent with the client that chose him and though it was likely they would press for him to provide more intimate services, he was told how best to avoid it and thus avoid straying into the illegal pitfalls of the escort service. It wasn’t illegal for a bloke to go out for a drink and conversation just because he was paid to do it was it?