Allowing people to drop in; that is, to visit casually, without an appointment.
Provided for short-term use.
Fit to substitute for some element in a complex system without changes to the existing infrastructure.
The act of dropping in; that is, taking a wave that another surfer is already riding.
A place that can be visited casually, without an appointment.
One who casually drops in (visits unannounced or without appointment).
An informal event that does not require booking in advance.
That people may enter without a prior appointment.
Accessed by walking, either exclusively, as a campground, or together with drive-in access, as at some drive-in movie theaters.
Gaining access through unlocked doors.
Designed to be possible to walk into (without stepping over a ledge, etc).
Spacious enough to walk into.
A demonstration or protest in which the participants assemble outside a facility, gain media exposure, and enter the facility in unison.
A relatively small room (such as a closet or pantry) or refrigerator or freezer that is spacious enough to walk into.
A customer, job applicant or similar who visits a restaurant, medical facility, car dealership, etc. without a reservation, appointment, or referral.
A relatively larger room or (especially) an apartment that is entered directly, not via an intervening passage or lobby.
A person whose original soul has departed the body and been replaced with another.
A facility or an event that principally handles customers who do not have an appointment.
A defector (or similar) who walks into an embassy (etc) unannounced.
A facility accessed on foot rather than by car, usually contrasted to drive-in.