Green’s Dictionary of Slang

use at v.

also use

to frequent, to visit.

[UK]J. Mair Hbk of Phrases 116: Use, to frequent a place.
[UK] ‘Autobiog. of a Thief’ in Macmillan’s Mag. XL 502: I got in company with some of the widest (cleverest) people in London. They used to use at (frequent) a pub in Shoreditch.