hey Speakeasy,
yeah, sounds like a good environment to test pheromones 
But first, I’ll recommend you some reading - here in the “Introductions” section of the forum you’ll find a few sticky threads, please read them. You’ll find answers to all questions you can possibly have at this stage. Refreshing the relationship and getting an advantage at work plus some edge in clubbing/nightlife scene are probably the most common jobs people employ pheromones to do 
With the girlfriend, I’d suggest to start easy, with low dosages of pheromones and then build it up over time. It doesn’t have to be a long time and will go well with your sweet spot testing - you’ll find out what it is while doing your homework
You’ll probably confuse her to death if you just sprayed yourself heavily with strong products.
Some products that should work both for the relationship and work:
A314 - preferably the oil version. In my opinion, the best pheromone product ever. Some users say it was even better few years ago. I don’t know about this, only been using it for a year now. Promotes respect, trust, masculinity, confidence, high status. Requires some skill, as can be very so intimidating to others that they will actually avoid any verbal or even eye contact with you. Also, requires perfect congruence between its signal and your behaviour, body language etc. Otherwise, you’ll get a lot of nasty shit-tests and challenges. Again, some users find its vibe too serious and mature for romantic situations; works well for me. But that’s the case for all pheromones - they work different for everyone.
Instant Gentleman - somehow similar to A314 (as both based on androsterone) but lighter, less intimidating, more youthful. Only in spray version. I haven’t tried it, as I already look much younger than I am (people usually guess that I’m 21 to 24) and found A314 to be just perfect. Some users actually prefer IG to A314 though, so worth a shot.
Instant Shine - different take at confidence, more of the “I feel so good in my own skin” type. Relaxed but energetic vibe. Lightens the heavy masculine products without taking away from their quality and effectiveness. Most experienced find it a perfect finishing touch to almost every mix.
Ammo - good alround product, balanced amounts of androsterone (respect), androstenone (sexuality) and androstenols (approachability, rapport, connection). Depending on a dose and mood, can be used in pretty much all situations. As all androstenone products, needs some care as can be overdosed and act as a repeller.
When you do some reading, you’ll find some more interesting products, these are just a few examples.
Welcome to Pheromone Talk 