Any question answered...

I would like to gift my partner tickets for the CATS musical and I need some general advice.

• Which seats do I get? I would like the balcony seats for the lolz (I imagine myself sitting there with a tux and binoculars) but view and acoustic might be better in the frontal seats. Also the frontal yellow seats (on the bottom) are not available on Saturday, which I would prefer.
  
• When do you have dinner? Friday performance is at 7.30pm and saturday at 6.30pm and goes for 2h45min incl. a break. Before is too early or straight not possible due to work and after might be too late. Are there snacks during the break?
  
• Any etiquettes that I should know? You may have noticed by now, but I'm quite new to this environment so any advice is appreciated (dress code etc. although I'm quite sure I don't need a tux for a musical)