This is what it says in the Terms and Conditions (emphasis mine):

d. Access to the Club Level Lounge when staying at Sheraton hotels or access to the Executive Level Lounge when staying at Westin or Le Méridien hotels, even when not staying on the Club Level or Executive Level floor(s). At Sheraton properties, access to the Club Level Lounge does not mean access to the Towers Level Lounge, even if there is no Club Level Lounge in the hotel and there is a Lounge of any kind in the Towers. Access to Towers Level is determined by each individual property. These benefits are limited to the member and one guest IF that guest is in the same room as the member. Lounge access is not available if a lounge is at maximum capacity or if a lounge is closed for any reason.

My interpretation of that is that you can bring only one guest regardless of how many rooms you may be holding in your name. As with most anything, however, YMMV.

Best regards,

William R. Sanders
Online Guest Feedback Coordinator
Starwood Hotels & Resorts Worldwide

[email protected]