business people applauding for public speaker during seminar at convention center

20 24 30 34 35 39 40 44 45 49 adult applauding at attending audience business businessman businesswoman card caucasian center clapping collaboration collar colleague color communication concentration conference convention corporate crossed day dressed eastern ethnic ethnicity event expertise focus front global group holding horizontal identity image indoors knee lanyard large legs listening looking mature meeting men microphone mid middle multi occupation of office part people person photography presentation professional public selective seminar sitting speaker suit talking view well white women worker years young