I wouldn't play it loud enough to bring me grief with the police, but just as they have a right to smoke in their yard, I would have the right to play music in mine. I happen to enjoy polka and yodeling music sometimes.
I think if most people heard their neighbor playing music that is weird, they would probably just laugh at their nutty neighbor & it would make for great conversation while they are smoking

I'm not trying to criticize polka & yodeling, BTW (I actually think yodeling is kinda cool!), & I'm sure you know what I mean.
As I said before, this is just going to cause trouble between the OP and his/her neighbor. I can bet you that these neighbors and store owners are not thinking "Oh goody, let's piss off our neighbor by smoking outside!" They probably have no idea that it's bothering anyone, which is why the OP might consider politely asking them if they could refrain from smoking under the OP's window. By trying to sabotage their summer and do annoying things on purpose, the OP is just setting themselves up for disaster & the OP would definitely be in the wrong here.
With all of the bans on indoor smoking in restaurants, bars, stores, etc in many states nowadays, people smoke outdoors. As a non-smoker, you can't have both worlds-people are either going to have to be allowed to smoke indoors or outside.
As a light smoker myself, I am grateful for the banning-it's a good thing! I also do not smoke inside my house ever. I do however smoke in my private yard or while in my car. I am well within my rights to do so & I do make the effort to stay away from others when I am lighting up. Not everyone thinks like that though.
OP: please don't ask for trouble by intentionally pissing off your neighbors. I can pretty much garuntee you it is just going to make the situation worse & morally, you are going to be in the wrong, not them. Try to politely ask them about refraining from being under your bedroom window. I'm sure you can come to a compromise and meet halfway on this one if you are polite about it.