I gave the cats some catnip tonight on paper plates. You would surmise they're getting along now. Lucky took advantage of Bootsy's stoned state to get a little closer and commune with him. All Lucky really wants is to get along and party a little, if not a lot.
I'm keeping Lucky's Humane Society-issue collar on him for now, since if he jumps or falls off the terrace, it'll be easier to get him back. My phone number is on the tag. (But he also has a microchip embedded between his shoulder blades somewhere. I've felt around for it but haven't located it.) (Lucky's a very modern young cat.)