The internal JOSM presets has integrated golf presets since version r9640.

<?xml version="1.0" encoding="UTF-8"?> 
<presets xmlns="http://josm.openstreetmap.de/tagging-preset-1.0" 
author="bcattelino" 
version="0.1.28_2019-10-06"
icon="wifihotspot.png"
 
description="Presets for Mapping of Wifi Hotspots"
shortdescription="Wifi Hotspots"


link = "http://wiki.openstreetmap.org/wiki/Tag:leisure%3Dgolf_course">

        <group name="Wifi Hotspot" icon="wifihotspot.png">
                <item name="Wifi Hotspot" type="relation,closedway,node" de.name="Golfplatz" fr.name="Terrain de golf" icon="wifihotspot.png" preset_name_label="true">
                        <link href="http://wiki.openstreetmap.org/wiki/Tag:leisure%3Dgolf_course"/>
                        <label text="A location where you can access internet wirelessly" />
                        <space />
                        <key key="leisure" value="golf_course"/>
                        <text key="name" text="Name" />
                </item>
                
        </group>

</presets>

Presets_WifiHotspots-preset.xml, Presets_WifiHotspots.zip