Servers suffer as gratuities, and their incomes, plummet with the economyNobody is sitting at the rack at Mary’s Club on a Friday afternoon. The rack is the counter that lines the stage at Mary’s, an institution among Portland strip clubs, at 129 S.W. Broadway Ave. Customers who sit at the rack, up close to the dancers, are expected to tip dollar bills or more throughout the performances. In fact, there’s a sign in Mary’s Club that reads, “If you’re watching and not tipping, you’re stealing.” But it’s easier to watch and not tip from seats further back or at the...