I agree. It just didn't sit right with me either. Assuming the cake cutting scene location was different then the gold telephone location and they had to take a cab to get there, maybe Johnny Ola was short on cash and bummed a ride from Mike, but then it brings up the question as "how did Roth get to the meeting". Of course if Roth had to take his wife, I would imagine they got 2 cabs since there wouldn't have been enough room for Roths wife's fluffy dresses she likes to wear.