Green’s Dictionary of Slang

referring to a place or a person who is used for casual sex.

1929		in W. Winchell On Broadway 7 Aug. [synd. col.] ‘Pick-up’ men who leer and flirt, making eyes at every skirt.
1952		Lait & Mortimer USA Confidential 92: It mentioned ‘the dark, grubby, dirty, pick-up and sex-nasty places which have flourished under her regime’. [Ibid.] 93: We asked a cab driver where the pick-up gals hang out.
1963		J. Rechy City of Night 224: There are many men in that world who, outside of pickup places, wear a mask convincingly.
1963		K. Waterhouse Jubb (1966) 153: I spoke [...] making it appear that I was not a corase pick-up man.
1979		Maledicta III:2 222: As Tessie O’Shea sings, ‘Nobody loves a fairy when she’s forty,’ and pick-up bars (like heterosexual singles’ bars) put a premium on youthful appearance.
1986		J. Ellroy Silent Terror 204: [T]he Co-Ed Connection and Now & Wow were pick-up joints where men and women worked out on Nautilus equipment and took saunas together.
1993		K. Lette Foetal Attraction (1994) 145: Your pick-up line was ‘Want to go halves in a baby?’ Remember?
1999		Indep. Rev. 10 June 4: What’s the worst pick-up line you’ve ever heard?
2001		K. Waterhouse Soho 189: Some fanciable chicks, could be a good pick-up joint.
2004		P. Howard PS, I Scored the Bridesmaids 161: This is a pick-up joint, not a circus.