I'm not the most social of people, but I have a small number of friends and acquaintances. I've been wanting to hold parties at my house for some time, I have a wood-fired oven and would love to make pizzas for everyone, for example. But I've been struggling to even get more than a couple to come, and then I have the opposite problem, there's not enough to make it worth actually setting up a party, so I typically cancel in the hope I can have better luck on another weekend.
I've been organised, I create a telegram group, invite people, make a doodle poll to see when the most people are available, and set a date typically a couple of weeks out or more. But pretty much the week before when I send out a reminder, it seems a lot of them can't make it, they're working the weekend, or they have other plans, or another event comes up that they forgot to mention (they do seem to have much busier social lives than me, to be honest). It always seems sincere enough, I know most of them and I doubt they are doing this deliberately, but it's becoming increasingly annoying to have been looking forward to hosting a party and then having your plans dashed, and disappointing the couple who did express an interest.
I've also been wary of inviting too many people because I wouldn't be able to cater for all of them if they all showed up, plus my house isn't that large so I don't want to be overrun.
Honestly, all I'd like is to be able to plan and execute a house party that's an appropriate size with a least a couple of weeks advance warning, not just a couple of people but not a huge crowd, something I could plan for numbers (so I could make enough pizza bases or whatever).
Some further information, the people I invite are typically a mix of locals and those further afield (I don't plan for them to come but I invite them anyway just in case). I do say they can bring friends along long as they tell me first, and I haven't been to many parties at their places, usually because they don't host any. This is in the UK, with people in the 18-30 age group with a common interest.