Hall of Infinite Doors

The first note reads:

ATTENTION ALL INFINITE HALLWAY TRAVELERS, ARE YOUR FEET GETTING TIRED? WHY TRAVEL ABOUT WITH A METHOD AS BANAL AS WALKING? WE HAVE A LARGE SUPPLY OF SEGWAYS TO HELP YOU TRAVEL AROUND THIS HALLWAY IN STYLE. SEE US MUCH DEEPER IN THE HALLWAY AND WE WILL HOOK YOU UP WITH ONE.