Green’s Dictionary of Slang

Crocky’s n.

[abbr. + sfx -y]

Crockford’s, the London club and casino, founded 1793, closed 1845.

[UK]R.S. Surtees Handley Cross (1854) 417: It’s all nonsense men spendin’ wots to kep them a lifetime in a single night’s lark [...] Ax any old member o’ Crocky’s if it isn’t.