I day gamed plenty of girls at my university, which had 7k students, and the town itself had only 10k+ people. And I also fucked two townies (don't judge me), so yeah, it's possible.
Of course, I would ALWAYS recommend you move. If you want the true beauties of the world, you will need to go where they go. Sure, there might be some gem in your town, but usually it'll be tough to get her cuz there's so much competition and she's gonna be pretty picky cuz she knows she's #1 in town. Putting all your eggs in getting that 10 isn't a good move. Any big US or European city will have a 10 on every other block.
Seriously, it's something you should do.
Of course my university is a special demographic where 60% of the 7k student body is 18-21 year old girls, so that's ~4k available girls.
You live in a city of 200k...so let's say half are women.
100k.
Let's say 80% of this is grandmas, ugly bitches, not of age girls, fat bitches, etc. Women you won't want to fuck.
20% of 100k is 20k. That's 20k girls who are fuckable.
10k who are cute
5k who are pretty.
2.5k who are BEAUTIFUL
1k who are GORGEOUS
Half of them are taken.
That's 500 gorgeous girls out there, and more cute/pretty ones, who are single and down to suck your dick if you got the game for it.
And with a city of 200k, you won't have reputation issues for at least a few years unless you really focus on certain areas and fuck it up bad.
Man, you got more girls available than most PUA's could approach/text/meet/date in a lifetime.
Now if you had 1,000 people in your town, I'd understand where you're coming with, but you're fine ;D
As for opening girls in shops...it's best to either
1. See them walk in and you were gonna approach anyways, so you go inside and open
2. She's really someone you're feeling or she gives you an IOI. Cuz after one approach, MAYBE TWO, you're pretty much out of options and gotta leave.
As for how to open, be a bit more quiet and try not to draw attention, but don't be a pussy either. But be very slow and calm.
A nice "Excuse me," before saying the rest will help ease the tension.
Hector