Honestly you might be missing out on the best work out of your life, imagine getting the same results you'd get while in a sweaty gym in London, you can still train with your friends or by yourself or even with your personal trainer, who knows a passerby might even want to get involved, you honestly never know what's going to happen outside mid push up. 😂
Personally I've not trained people in gyms for 3 years , I hate it, I love having the freedom of having different views everyday while working out along with the fresh air, which actually isn't so fresh nowadays but you get what I mean.
As a personal trainer i recommend all PT's to scrap the gym and get all their clients training outside especially in summer!
Training outside brings loads of compliments to your doorstep too, the public actually cheer you on once in a while, you may even be motivating them to start working out outside in the future.