Lobby

Basic Description
The Lobby is the only room that can be placed at L1 of all towers. [Obviously...] This is the main place where people enter your tower (some arrive through parking or Metro/Subway).

Use and Design
This is where your tower begins and where all people enter.

The Lobby's design changes per star rating;

1 & 2 - Wooden walls, vintage seats.

3 - Red wallpaper, Ionic Columns

4, 5, & Tower - Green and rock Greek revival palatial

Types
There are two types of lobbies:

LOBBY - Only on Level One [L1]
SKYLOBBY - Only on Levels divided by 15 (15,30,45,60,75,90), Express Elevators can link to these floors.

People
Only:

People going to work in offices,clinics

People staying at Condos and Hotel Rooms

And People shopping at shops, eating at Cafe/Fast Food/Restaurant, Attending Theaters, Party Halls and Cathedrals...etc...

Cheats
If you hold Alt while placing your first lobby, you will build a 2 story lobby. If you hold Alt+Shift while placing your first lobby, you will build a 3 story lobby. Taller lobbies provide better stress relief.