Check out these kick ass custom units you can purchase from a new company called Fragisle.
You can get these coin operated or in various other forums. The 2nd picture is of a 3 sided unit that would be perfect for a gaming lounge or tournaments.
Heres a quote directly from the company:
"We have designed a system where console games can be operated in a pay for play environment. The machines are built in an arcade version, and a four sided tournament version. These configurations afford installation flexibilty in a variety of locations. We are not affiliated with Sony, Microsoft, nor Nintendo, nor do we have any relationships with software publishers. We simply provide the tool, to deliver console gaming entertainment in public venues. "