Awesome that you take group fitness classes. I belong to two gyms at the moment, one is La Fitness where they used to offer a bootcamp class (did it for 7 years, then got cancelled) and the other gym is owned by two women who offer just group fitness classes.
I've noticed (atleast in NJ) most men for whatever reason are not into group fitness (only maybe Crossfit) and there are plenty of women in these classes. I met and hung out with a 21 year old (I was 41) and also went out with a Bulgarian (10 years my junior) thanks to these group fitness classes.
You are right, most of these classes you have to do the talking 5 mins before or after.