How do you get lab experience at uni?

I'm studying biomed and I want ro get as much lab experience as I can. im currently on a lab placement that was supposed to be 10 months but due to delays is more like 6. someone else on my course (I don't know who she is personally so I cant really ask for her advice) somehow got some summer experience working in the uni lab with one of the lecturers which seemed really cool. it wasn't an advertised position and I know whe must have done some networking to get that opportunity, but I don't know how this type of networking works! does anyone know how to go about talking to lecturers to get this kind of experience?