When I started training I did have the opinion that it would be a terrible idea to get with someone from the gym but I was chubby, and awkward so it wasn't something I anticipated coming up anyway.

Training over time fixed both of those personal issues though and someone eventually caught some feels for me (bad taste,) I'm not the dating type and I figured if we hooked up even with clearly set expectations it had too much potential for drama so I stuck to my guns about not getting involved.

Turns out I was being naive and things got awkward for her regardless and she ended up leaving the gym anyway.

Now my opinion is that you shouldn't actively seek it but if two single people are clearly interested in each other they shouldn't let the potential for awkwardness at the gym get in the way.
Just have good intentions and be willing to continue training even if things are uncomfortable for a bit.