You could start drinking now, that way you will kill two birds with one stone, you will be pre-buzzed before the party (allowing you to go in pussy magnet mode that much faster), but more importantly it also can put you in that false alpha male thinking. You now the kind that makes a skinny twink walk around with arms flared out thinking he's Brad Pitt.
Sometimes that can get you motivated to hit the weights, it probably won't be very productive, but the important thing is that when you are drunk you will think it is the most productive workout you ever had.