The best place to play is an apartment.
True. Games are at the Game Master's apartment. This brings people into contact in a private space. Knowing where someone lives can be a disadvantage if someone becomes "uninvited" for some reason. Some locations have children - which is why I protect the group's reputation here from wierd comments. Creepiness has been an issue in the past. We had a group of 14 strangers playing together at one time, which had an even split between men and women. Gamers do not have the exclusivity on freekiness on The Internet obviously but The Internet is not invited into someone's living room.
I have an interview process to winnow out people, which I have refined over time.
2. I like to prepare a game one week before
As you can see from postings before, there is a time requirement for GM preparation (including a first one-on-one game called Blue Booking). Also there is this wiki
specifically for munchkins; from a time when gamers were welcome before their abuse of players and the resulting cycles of destruction/rebuilding/destruction of groups made that policy unrealistic and a waste of time.
if players act ignorant on the table, I feel bad.
Making the rules work according to the desire of the players is the GM's job. The players do not have to learn how to move the levers of play. They just need to know the possible consequences and risk from using their agency. No player should be forced to study a rulebook. A list of spells can be chosen from laminated spell cards and managed by the player as a resource easily without involving the player in too much minutia. People want to play not devote a life to the study of min-maxing.
It is leisure time not work. Surprising how many people will not come back when they feel intimidated by their "comrades," the gamers.
3. There is an other extreme which is the gamer who thinks he/she knows everything and tries to argue at the table, spoiling all the joy.
Been there, done that, no longer going to happen. It is about making friends not invigilating or being crowned king of all role-playing. I have had gamers tell me that players do not deserve to play if they cannot master the game. Gamers have told me they feel such players hold them back. This bile makes me sick. Gamers are not at the game to make friends when they think like that. My group is not for gamers.
4. I was also an anti-social person in the past and I think if a person is anti-social, he/she should be encouraged
Thus Role-Play at my table is conducted through player interaction rather than dice mechanics. Gamers have told me this is elitism. Arguments include such logic as a player must be a trial lawyer to play a trial lawyer.... and these unimaginative comfort-zone only gamers are at the wrong game table. And I won't have them.
instead of being separated with a 'nerd' or 'weird' label. That's like, the worst thing you can do.
I have found the question rests not on being labeled a geek or a nerd but whether or not someone is geek or nerd enough. Sad. This comes from the gamers. People who are not up to a gamer's standard are labelled casuals and treated as disinterested. Not the best atmosphere in which to make friends - again, making friends is the goal of my group. Common gamer behaviour is at cross purposes. And few people like them as they retreat from social interaction into their niche hobby elitism.
5. Don't generalize.
I am too old to continue reliving past mistakes. Heuristics are necessary. 4 years is enough data gathering to make a decision. No gamers.
6. What rules of dungeons & dragons you use while role-playing I wonder?
What follows herein is strictly for the eyes of you, the campaign referee. As the creator and ultimate authority in your
respective game, this work is written as one Dungeon Master equal to another.
You're supposed to be providing entertainment for yourself and all of your players, so I don't allow arguments at all, and sometimes [the players] will show me my own rules and say, "Look, it says this in the book," and I say, "Who cares? I just told you otherwise.
This link, too, might also relate to your query's impression, why our game seems so very open-ended to you as to be without rules. When I was playing in 1979, this hobby attracted a highly social interaction.