Revealing mistake: When Victor is opening the padlock, sparks fly around in close ups. In the wide angle shots there are no sparks at all.
Continuity mistake: When Ricky leaves Michael's apartment he has the envelope with money in his left hand. When the shot changes, we instantly see him walking away empty handed, with the envelope lying on the table.
Chosen answer: It might not actually have one, in which case, he'd have to go down into the club and use theirs. As for showering, going to his mother's house or a gym membership would take care of that.
Captain Defenestrator