International visitors (like me) actually won't be able to enter the lounge. To be called back you need to give an US mobile number or wait around, which is not reasonable to do for 3 hours. And remember, international visitors cannot buy MMB. The only option is to buy a local SIM for the stay, which is an additional expense.
Couldn't you use google voice? Make a Google account while in Florida and get a google voice number, and then provide that number to the cast member? Likewise when checking in for table service dining they ask for a phone number.