Yoyo,
If you are hanging out and playing cards with a mixed group, expect that guys will feel able to flirt. To put it simply, it’s a moshav letzim. Cards (or whatever game) is an excuse to get together with people. If they invited you for a game, then they are strategically hunting you; the game was an excuse to bring you in – bait.
Your best bet is to avoid such situations (mixed crowds). Only hang out with other ladies, and make it known that’s what you want. Your lady-friends should know this so that they keep guys at a distance from you. Otherwise a guy might use a lady to invite you and him to the same event (i.e. she will do his dirty work, maybe unwittingly). You will innocently think that it’s a ladies only activity, but the guy has other plans.