I've seen two things that were both called Indian Wrestling.
One is basically arm wrestling, but with your legs. Two people lie down in opposite directions, hip-to-hip, trying to hook and yank the other's leg to the ground.
The other has two people stand, sort of facing each other, bracing the inside of (for example) your right foot against the inside of the other person's right foot, then you clasp right hands and try to pull the other person off balance so they stumble out of position.
I think at least one of them was described and illustrated in the Ninth Edition Boy Scout's Handbook.
The notion that Peppermint Patty was a lesbian is ludicrous, but the world is full of idiots, with a sprinkling of homosexuals who want to believe that all of the popular fictional characters are the same as them.
Peppermint Patty was constantly hitting on guys and talking about how romantic doing this or that with a guy would be. She just tended to strike out because she was overbearing, aggressive, and often annoying, while also tending to be completely unable to read the room.
Bon Voyage Charlie Brown has some perfect examples of this. She swoons over the hetero romantic wartime story of Charlie's ancestor and she constantly hits on the guy she and Marcy are staying with, while completely missing that he's holding hands with Marcy.
Even in the end, she's thinking this guy will have to get over her when she's gone, while totally missing how Marcy is swapping spit with him.
Which should also tell you all you need to know about Marcy's interests, too, since she's the one weirdos and people who think they're more clever than they actually are constantly try to romantically pair with Peppermint Patty.
And the "they protest too much" theory that they act blatantly hetero to hide their sapphic nature doesn't play, since the comics show us how they act when no one is around... still hoping to bag Charlie Brown!