|The following is based on Fallout: New Vegas behind-the-scenes mechanics and similar content.|
The 2EOCasLoHotelLobby is a test cell in the game files of Fallout: New Vegas.
The cell uses the same casino layout as 2EOCasHiHotelLobby and Dummy Cell for Scripted XMarkers, with a large central area, adjacent toliets for both genders, and corridors connecting it to another large room. Notably, there's a doorway leading downstairs to a Vault, indicating it's a (very) early version of what ultimately became Vault 21.
2EOCasLoHotelLobby appears in the game files of Fallout: New Vegas but should not be considered canon due to it being a test cell.