Hard-core skiers and boarders at Mary Jane know about it, but few tourists wander into Pepp’s. It’s just as well. They might feel out of place in the Mary Jane base lodge’s dimly lit basement bar, officially called Pepperoni’s Pizzeria and Bar. Its creators at Winter Park Resort appeared to go out of their way to remove any ski-resort trappings — but for thousands of Pepp’s most devoted fans, both the dingy red-patterned carpet and the anti-resort vibe are among the draws. The measure of regulars’ love for the place is easy to see — and count: Glass mug after glass mug line shelves behind the bar, and they fill racks that dominate the cramped kitchen, where bartenders make Pepp’s popular $3-a-slice pizza. All of the mugs are claimed, with a tattered list of mug-club members on a clipboard now holding steady at 2,800.