If you mean job experience as in a part time job in my field, then no, I do not have any job experience.
When you refer to joining groups are you referring to ACM? I am actually thinking of subscribing to ACM.
Also, this may sound weird but I heard somewhere that people actually go for internships after finishing college, is that true, or is it all baloney?
Without any job experience, an internship, or anything of the sort, you are basically un-employable in full time work with any sort of good salary. Unless you are the top of your class, and from a very good school, you have basically no way to justify that you will add anything to an employer. As others have said, you may need to focus on finding an internship, any type of internship (which may not pay) to get your leg in the door. Even people hiring for a temp or contract basis would be hesitant to hire you since you have no real world experience.
I have no idea what industry groups are present in your field. For me (a mechanical engineer) joining ASME, ASHRAE, etc would accomplish what I'm talking about, and with the number of social gatherings, facility tours, etc, you can get solid networking in.
Yes, you can do internships after finishing college. If you look at large companies, they usually will have careers listed for new graduates, or for those graduating soon. Either section would work for you.
I know it is uncommon for this generation, and probably in your industry, but you need to get off your computer and not look for jobs there. Your college must have a career center - go talk to them. Do you have a professor you like or did well in their class - go talk to them. Are there any companies that sponsor labs or anything in your college - look at their websites, find an HR person, talk to them.
Get off craigslist, get off the classifieds, none of those will be what you want. Look at linkedin, look at indeed, hire a recruiter - those are the only things that may help.