Drinks for a party

[PeacheyPeach]

We are having a garden party in a few weeks, it's going to be quite a large one thinking about 60-70 people,
Trying to work out how much drink to buy, how much do you think we should be buying in terms of booze , we may offer a couple of cocktails also

Majestic you can return unopened wine cases, so you can over buy and just take stuff back (that's what we did at our wedding).

Hugo is a good cocktail at it's not too alcoholic - elderflower, soda water, prosecco and crushed mint leaves.

Are your guests likely to bring drinks with them? Do you know what they drink?