walk right in
walk in
To enter some establishment or event as a casual attendee. We encourage all patients to make appointments, but we do offer a clinic in the morning where you can simply walk in. We've had people walking in all evening, so we actually had a decent crowd by the end of the night.
See also: walk
walk right in
to enter on foot without hesitation. He went up to the door, opened it, and walked right in. Please just walk right in!