These aren't your father's Republicans. Paul Makarechian, 31, showed up in jeans to host an event with Assembly GOP Leader Kevin McCarthy of Bakersfield. That was at Fashion Island's trendy Ozumo Japanese restaurant. Another of the group's events, this one featuring a congressman, was held at Costa Mesa's hip Sutra Lounge. One of the group's board members, land broker Craig Atkins, is spending much of the year surfing the world's best waves. Makarechian, the chairman, gleefully lists the spiky hair of one favored candidate as an attribute. The group, less Atkins, flew to Vegas this month for its board retreat,...