Need help with socializing

I just recently moved to Japan for college and I want to practice my Japanese with locals through playing this one card game called Weiss Schwarz. I know all of the words for the game and can understand all of the cards fine, I’m just having trouble finding people to play with. I go to Akihabara a lot to try and find people but I just always leave with no success because I get cold feet at the last second. Is there a specific way to approaching people and asking to play? Should I just go up to someone playing and ask them about their day or something? Thank you all for your help!

by AppleyCorn