I understand it's a treadmill. Yes, there's wifi in the rooms. They have local gins and yes, they have tonic. They have premium gins but you must pay for those. I'd do an internet search if I were you and enter 'Castries Weather Forecast'. There are no mini bars in the room, alcohol is available through the whole day from a variety of bars. Tap water is drinkable. You pay for bottled water and you collect that from reception. Hardly anyone does that which is great for the environment as plastic bottles then don't end up in the ocean. Have a wonderful holiday.