A キャッチ (catch) is actually slang for the people who stand outside and grab CUSTOMERS
The people who try to scout girls lfor the night industry are called SCOUTS or スカウトマン
They scout for girls bars, kyaba, sexy kyaba and fuuzoku (adult)
To break these categories down:
Girls bar: girls talk to clients from behind a bar
Kyaba: girls talk to clients seated next to them. No touching allowed
Sexy kyaba/oppabu: a kyaba with touching above the waist
The more adult places can be broken down into:
Esthe, Health, Soap
Esthe is massage with a happy ending
Health and soap can get confused easily and if any of you are more knowledgable please comment. Afaik health is hand/mouth/frotting and soap is the only place you can (technically) get FS - which is actually illegal btw