Tolerance

I was out with a friend last night. We started early, i had other plans and he wanted to get to bed early so we met around 4:30. From there we went to a pub, a nice enough place with an added bonus of dodgey men in the corners. We started with a glass of whiskey on the rocks. I felt a little light headed, but nothing worth noting. Then we headed across time to another pub, by which time the little buzz was completely gone. I managed to drink two or three gin & tonics and the new establishment. Then we left and headed to a more modern bar - where i had two drink of whiskey and coke. You would think by this time i would get a little bit tipsy?! But no such luck, damn tolerance! I ask you, what (and how much) does a girl have to drink to get drunk?
Being the shameless tourist that i am, i'm off on a Haggis Tour tomorrow! Where i hear all there is to do is count sheep and drink. A lot. I'll report on my research in a few days.