The idea of MeetUpMondays being held in hospitality businesses is that they occur in ‘everyday life’ situations within the normal, daily running of your service, to keep your workload to a minimum and to ensure the consistency of keeping them running.
If only a few visitors turn up one week – you’re open anyway so no extra arrangements would be wasted. Sometimes local volunteers get involved by being friendly ‘Meeters & Greeters’ or helping to serve the tea/coffee, so no extra staff should be needed.