[capableweb]

Some sub-groups of people are more frequent visitors of some type of events than others. Depending exactly what you mean with "parties", it could be that those types of events are not the right one to find the sub-group you're out after.

If you wanna find people to talk about finance, you wouldn't attend a football match, for example. So if you wanna find programmers, you're gonna have to attend programming related events, or some related area like hardware hacking, or just generally "makers" meetup.

For political groups, there tend to be groups of those all over the world, for every affiliation, but depending on the ideology and the overall political temperature, sometimes people try to avoid letting those opinions bleed over to other areas of interest.