That moody elf was briefly glimsed before. When Gary had a plate of nachos he didn't want to share, Daniel (that's his name!) was hiding in the same box he's leaning against now. In one panel, while Gary is away bickering with John, he stretches an arm out to grab a nacho.
Small elves, by the way, don't merely look sickly, they are. The genetic disorder that forces them to be cannibals is messing their body up too. A great elf is basically any elf that doesn't have this disorder, usually by coming from a mixed population, though with genetic science, the advent of healthy pure-blooded elves might be close. Some say it already happened, but they may just be conspiracy theorists.
A tub? Im thinking that might be slang for pitcher of beer...unless he actually means a bath. Which does seem a bit odd.
Ah, but here is a business model you wont see everyday -- A Bar, Grill, and bath. Eat, get drunk, and soak in a tub. Not exactly the mostly manly of establishments, but it takes all kinds, right?
Next pages will explain it, until then I'll say it's a fairy thing. Traditionally a girl-fairy thing (hence the elf finding it "gay") but Gary is a modern guy.