We hardly ever old parties. My mum and I don't particularly like socialising with big groups of people. This is sometimes a bit unfair on my dad, who does. He would probably like to go to more parties than we do.
We have held parties for special occasions though. For example, my Dad's 50th & 60th birthday. You can see that I was not exaggerating when I said we don't hold them very often.
Our friends hold dos more regularly, and we attend those occasionally, but in general we prefer small get togethers.
Halloween is huge for me, and we have a party every year, but otherwise, just summertime. Drinks, cocktails or even just a bbq by the pool. Not really a party for a special occasion, just a celebration of getting together with good friends, music and waning sunshine....