Can't get to the gym till Saturday. HELP! (I'm freaking out!!!)

I recently was unemployed and decided this was a good time to get in shape and joined a gym. Money being limited a chose a plan that let me attend between 8am till 5pm

I recently got a job and I'm in the process of changing my membership, but until then I won't be able to get to the gym till Saturday.

Can anyone suggest what I can be doing in the meantime to stop me losing any muscle mass, and maintain strength. I don't have any equipment.

PLEASE HELP!