B3313 Unabandoned - So. Many. Lobbies.

"This castle is all there is. You've always been here."
All variants of the vanilla game's castle lobby, and how to get to most of them.
There are several other areas called lobbies in B3313, but I've only included the ones structurally similar to the lobby in the vanilla game because to me, those are the most unsettling. Might make a video of the other lobbies at some point.
00:00 starting out on the Castle Grounds
00:17 Beta Lobby A - go in the castle using the front left door.
01:15 Beta Lobby B - in A, go through the trapdoor again after defeating Bowser.
02:02 Beta Lobby C - in B, look up at the ceiling.
02:58 Beta Lobby D - in C, go through the door on the far left.
04:28 Beta Lobby E - go in the castle using the front right door.
05:19 Lobby.z64 (beta) - you have a random chance of ending up here if you enter either front door.
07:11 Twisted Lobby - go through the "clock" on the castle's front, then through the Twisted Red Hallway beyond.
08:59 Fabricated Lobby - enter the front doors from the Fabricated Castle Grounds.
13:04 Corrupted Beta Lobby - look up in the Fabricated Lobby.
15:38 Vanilla Lobby (day) - lots of ways to get here, but in this case, collecting the CBL star pops you out of the BOB (beta) painting. For some reason.
16:43 Vanilla Lobby (night) - identical to the daytime version except for different textures and creepy Star Toad.
17:49 Purple Upstairs - resembles the vanilla game's castle upstairs but includes an attached lobby-like section. Go through the key doors in the Vanilla Lobby.
18:49 Dark Lobby - go through the Vanilla Lobby doors that would normally lead to the Castle Grounds.
21:21 Parallel Lobby - although the entire area is called a lobby, it also resembles the vanilla upstairs with a lobby-like section. In the Vanilla Lobby room normally leading to Peach's Secret Slide, go through the middle window.
22:59 Fake Lobby - identical to the Dark Lobby except for different textures, as far as I can tell. Takes a while to get here, so I sped the video up. Go straight through Crescent Castle to get to a door hidden in the wall.
24:46 Lobby.z64 - no easy way to get here. The only route is to go down a pipe in Bowser's Domain.
25:26 Unsettling Maze - a dark replica of the Beta Lobbies is hidden within the maze, which is also reachable from Bowser's Domain.
27:29 unused - the only way to get here is by warping to Course 13, Area 12 with a program like Star Manager. A nonfunctional replica of the vanilla game's lobby is attached to this incomplete area originally intended to be used in B3313's ending that was never implemented. Unabandoned's "ending" sends you to the Monochrome Castle Grounds instead. Entering the castle there brings you to the...
32:08 Monochrome Lobby