Am I over packing for the gym?

[viva la momo!]

I am joining a gym and made a list of stuff to bring to hold.
There's free tanning so:
-tanning lotion
-tanning goggles
-ipod
-Droid to play games while execising
-bottle
-comb
-flip flops for shower (Or do I not need to worry about fungus?)
-towel (Or can I just air dry?)

I'm just going to wear my gym clothes and my sneakers there. Should I bring an extra tshirt and extra underwear that I can wear after I get sweaty?

love,
momo