The department is community-oriented with regards to grad students (although there are certainly students who decide not to participate in extracurricular events!), which you can find more about on the GLaM webpage. There are many graduate courses that undergrads are encouraged or allowed to take, which helps foster a tighter community among everyone from tenured professors to passionate sophomores. The department is also very interdisciplinary, with many professors holding joint appointments in other departments, connecting Ling students with Psych/Computer Science/Language/Philosophy/Neuro/Transcultural/etc students and faculty to build a holistic view of language.
In terms of get-togethers, there are University and department-wide colloquia and symposia that students can present at and attend, as well as GLaM events, (bi)weekly meetings with your interest group(s), and biannual events like the Open House and undergrad senior poster session.
Plus, the department isn't massive so you'll get to know everyone pretty quickly
