1
Sometimes people at agencies don't actually booze in their offices; instead, they hang out at certain bars.
2
On account of certain bars it is somewhat dangerous for inexperienced navigators, but not so for those who are acquainted with the channels.
3
Certain bars and fences are unshipped, and behold!
4
"Late at night, in certain bars around town, you may hear how Archie was one of the boys on the grassy knoll."