Bombay G&T, with a quarter lime squeezed and dropped in. Oh, and Schweppes tonic, not Canada Dry or store brand...big differences, personal taste.
A long time ago, in the Navy and on an R&R ships' party, I stumbled(?) on gin and grapefruit juice (canned, government issue, unknown why it was brought to the party). Amazed at the taste, and pretty pleased with myself, an ol' salt signalman put me in my place: "Aw hell, that's not new! Ya salt the rim and you've got a Salty Dog!"
Haven't thought of that in a long time. I'll have to try it with good grapefruit juice.