You might joke about cheese and coffee, but I've actually had coffee-rind cheese (The rind/wax had ground coffee in it). It wasn't bad - definitely an interesting flavour.
Decaf = Elf Long Rest/Short Rest hybrid, he can't stay up as long but he's getting some sleep
Latte-Lock = Probably this, it's a severely watered (milked?) down version of the coffee lock
McDonalds Scald Lock = Normal Sorlock throwing fireballs out of Warlock slots, it's not real coffee but it burns like hell anyway
Mocha-Lock = Same as the above build, but its Warlock 9/Sorcerer 5/Paladin 6, you get most of the good stuff of Coffeelock (not all the coffee goodness though) as well as the chocolatey flavour of Paladin, for a build sensation.
Premium Roast = Coffeelock, but you use Mordenkainen's Tome of Foes to sell yourwalletsoul to aseverely marked up brand that's not even that much betterdemon in exchange for even more power.
You can cast any spell you know, regardless of what class you know it from (exceptions apply, such as Magic Initiate). Which means any spell you picked with Warlock you can cast out of your Sorcerer spell slots, and vice versa. Hence why I didn't reiterate them - it's redundant to do so - the same spell is good no matter which list you picked it off.
Considered, I'll put it in as a Green.