A rogue text chime during a wedding ceremony. An errant cell phone alarm during a bar mitzvah. A guest not-so-discreetly thumbing a phone under the table during a dinner party. If youve ever planned a big event, youre probably familiar with these and other disturbances from devices. In January, the Pew Research Center reported that 90 percent of American adults own a cell phone, with 29 percent of respondents describing their phones as something they cant imagine living without. No matter the type of party, people will want to bring cell phones to it. But that doesnt mean you have