I agree with Raiden. Hopefully you can ask random people at the gym for a spot. Most serious athletes/lifters understand how important this is and that you aren't just bugging them or trying to make friends. But who know, you might end up finding a training partner by doing this. Maybe try going around peak hours just so you have plenty of people to choose from. And if you're lifting and that group you mentioned is there, honestly I would pay no attention to them and get my shit done. I say screw them bro