MI, stop reading depressing threads about fatness on MN and go away and enjoy your holiday. 
Eat, drink and be merry and worry not about your BMI.
I spent last night in the company of my lovely neighbours and various of their relatives. Most of the party were more dh's age than mine, but boy could they drink. We scoffed hot dogs and burgers, quaffed huge amounts of wine and beer and ended up drinking some kind of cranberry vodka thing that someone had brought back from a cruise and then we were dancing around the garden and singing to Abba. No bugger cared about what anyone looked like and it was all a lot of fun. Ds was shocked - again. Honestly, he should be used to his parents' disreputable behaviour by now. And I only fell over the once, anyway.
Took ds to the new Percy Jackson film this afternoon. He thoroughly enjoyed it, though he and his friend were grumbling mightily about how it bore very little resemblance to the book.
Zumba - I tried that for a few weeks before discovering circuit training. I didn't really get zumba, but then I don't dance unless I'm pissed as a fart.