Good club will never make you feel unwelcomed, although there still might be few people who act like that but that's not a big deal. Generally, people in clubs are nice people and you should just come up and introduce yourself. I first started riding with a club last year and people were very nice. If it turns out that all of the riders are jerks then it's just not a club for you and you move on. You have nothing to lose but might gain a lot of riding buddies. Good luck