I used to do the Starbucks/Borders thing when I had a wireless plan with T Mobile. Now I have a Verizon Air card so it doesn't matter.

It's a little hard to advise the OP without knowing specifically what he needs from the Business Center, i.e., PC, Printer, Internet, Phone, Fax, Conference Table, etc.

Outside of a printer, I've got everything else covered and can plop down anywhere I find an electrical outlet.