Best 24 hour gym in Anchorage

Do you also work out in Anchorage after hours? I mean not the usual 8 to 5.

I'm looking for the best 24 hour gym in Anchorage. So here's what I want to know:

• Which gyms are open 24/7? Not just Monday to Friday.
• If I have a membership, can I use it at other branches too?
• Can I still use the locker room, showers, and sauna late at night?
• And are they closed on holidays?

Appreciated if you share the name of your gym. Thanks!