With the whole lot of his 'peers' nesting in Sobek Croix like tangle of paranoid rats, Severus won't edge any further past the border than the nearest el train stop - not even to catch supper with Sebastian. So they are elsewhere, by the river in Griss Fell, and Severus is tolerating an outdoor cafe because Sebastian has the dog and he has cigarettes; this looks like socialization, if you squint, but it's more that Severus has been in quarantine for long that his cabin fever has reached the godawful extreme of accepting casual suggestions.

Oh, the humanity.

"How's the peanut gallery fielding your vile independence?"