I did a name rhythm game that my students loved, they didn't want to stop even when class ended. It's very simple: just slap your knees once, clap your hands once, snap right hand, snap left hand in a basic 4/4 rhythm and put words to it. For this lesson we did:
My name's [이-름]
slap clap snap-snap[/i]
Had to abbreviate "my name is" to "my name's" which threw my students off for a couple of minutes but they got the hang of it quickly. We went in a circle so each student could introduce themselves, then when they were able to do it perfectly I added difficulty by having the other students repeat names, going faster, having students do a "dance challenge" if they messed up the rhythm, etc. Simple and fun!