HAPPENIN’ OTSEGO for THURSDAY, SEPTEMBER 21 Open Mic & Author Presentation WRITERS SALON—7:30 p.m. Open mic and presentation with poet Clara Mae Barnhart, whose work explores her roots in Unadilla. Community Arts Network of Oneonta, Wilber Mansion, 11 Ford Avenue, Oneonta. Visit https://www.canoneonta.org/writers-salon RESOURCE FAIR—4-6 p.m. Network, learn about community government resources, see presentations on growing a business, more. Free, open to all businesses and entrepreneurs. Sidney Community Cultural Center, 1 Bridge Street, Sidney.…