Any places recommended for a party in Taipei?

My friends are going to host a little get together to welcome one of our teacher visiting. Do you guys have any suggestions for a very cheap group dining places in Taipei? Preferably a place that can also offer buffet or just inexpensive food. People might be around 30 to 35. Will love to try out some new places. Budget around $300 to $500 per person.

Thanks.

Maybe go to a 100nt plate 快炒 restaurant if you’re looking at 300-500nt a person willing to host 30+ people.