Walk into the gym you always pass and take whatever's on

There's a gym near you that you've only ever seen the outside of — the boxing gym, the climbing wall, the yoga studio up the stairs. Walk in and take whatever's on: the drop-in, the beginners' slot, the open mat. Badly is fine. Before you leave, ask whoever runs the front desk why the regulars keep coming back — the answer is never what the sign out front says.