Instant shine is supposed to create a feel-good vibe, so it should be good for any purpose.
Instant honesty, Instant openness and Come talk to me are similar products in that they actually have the same pheromones in them, but with different intended uses which is created by the differernt ratios of pheromones.
Instant honesty is to create deeper conversations. Openness creates a more friendly atmosphere and Come talk to me is an in betweener, though other users could probabily give a better discription and use for these as i only have IH personally not to mention have not used pheromones much myself.
You probably wont get much out of using any of those three together at the same time (though i believe some user do), so experiment with each of them independantly and find which one works best for you and stick to that one 
Not everyone gets self effects. I personally don’t. Spaceland and IS will probabily be your best ones to get self effects from, but since you have togo bottles I would suggest Not wasting it on yourself just yet. If you do, use Spaceland since this one is High in Mcg (50mcg of alpha if i recall correctly) So you should hopefully get self effects without wasting hardly any
As to ‘where should you go’ theres no definative answer. Depends on what you’re trying to achive, plus its probably better to think “which pheromone will be best for xyz” rather than tailoring your location to specific pheromones. Tailor your pheromones to your location instead 
their rather versitile so they can be used pretty much anywhere… If you’re going for cafe with a friend to have a nice big chat IS and IH would be ideal but IS /IH doesnt mean you should pop in the cafe to ‘pull’..
I would suggest reading the newbie threads. One of them has good advise on using pheromones to find you’re sweet spot, rather simple but easily over looked.