mgm grand garden arena will host floyd mayweather vs manny pacquiao .
the hotel in las vegas has hosted a number of big boxing fights .
this fight of the century is the biggest single event in vegas history .
hotel expect 50,000 people to pass through on friday and saturday .
mgm grand president scott sibella promises they wo n't run our of beer .
the hotel has 7,000 rooms and suites and 9,000 employees .
freddie roach : pacquiao could win with one arm behind his back !
click here for all the latest mayweather vs pacquiao news .