To do this, go to the menu with the roulette table options. Even before 65 I would use the these to get the most out of my 5min x2 XP boosts. If you don't, enter the lottery area and then exit to get the timer going again. I would also recommend increasing the member size too.
The tips also apply to Billionaire Casino. Here are some tips for those who are are working on Huuuge Casino.