It is considered international for the purpose of RCC access (the relevant portion of the profile is):
* * * INTERNATIONAL DEFINITION * * *
TO OR FROM THE UNITED STATES EXCLUDING SAN JUAN
CUSTOMERS WHO TRAVEL TO CANADA MEXICO ARUBA AND
ST THOMAS WILL BE TREATED AS INTERNATIONAL AND
CUSTOMERS WILL HAVE ACCESS TO THE RED CARPET CLUB
THIS APPLIES TO UA CUSTOMERS(F XF NF C XC NC)
AND STAR GOLD CUSTOMERS ONLY ..
That means that an F BP to STT gets anyone into the RCC. If you are *G, a Y BP wil do the trick.
Don't have a profile handy for the FCL, but my recollection is no-can-do.