Personally speaking, I think it's much better to exercise in a gym with equipment.

This is because it is convenient.

Whenever I go out and exercise, mostly, I have dinner with friends in the next few hours,[또는 most of the time, I meet up with my friends after that]

so it's better for me to work out in a gym because there is a place to shower. [또는 there are shower booths]

for me to Thus, I can just go and meet my friends right away.

and the second reason is because that it's more easier to actually talk to people in a gym than outdoors.

and I really like to exercise with other people, and I like to meet new friends.

and I think it's easier for me to make new friends in a gym rather than outside.

and The last reason[또는 Finally, I enjoy ~] is because that I enjoy to workout with equipment.

because I think it's more efficient.

Therefore, I think it’s better to exercise in a gym with equipment.

-> 잘하셨습니다. 전개 구성도 좋고 근거도 적절합니다.