The optimization process and recommendations:

1. Avoid OFFSET In LIMIT Clause (query line: 16): OFFSET clauses can be very slow when used with high offsets (e.g. with high page numbers when implementing paging). Instead, use the following \u003ca target\u003d"_blank" href\u003d"http://www.eversql.com/faster-pagination-in-mysql-why-order-by-with-limit-and-offset-is-slow/"\u003eseek method\u003c/a\u003e, which provides better and more stable response rates.
2. Avoid Selecting Unnecessary Columns (query line: 14): Avoid selecting all columns with the '*' wildcard, unless you intend to use them all. Selecting redundant columns may result in unnecessary performance degradation.
3. Avoid Subqueries (query line: 13): We advise against using subqueries as they are not optimized well by the optimizer. Therefore, it's recommended to join a newly created temporary table that holds the data, which also includes the relevant search index.
4. Create Optimal Indexes (modified query below): The recommended indexes are an integral part of this optimization effort and should be created before testing the execution duration of the optimized query.

Optimal indexes for this query:

ALTER TABLE `beverages` ADD INDEX `beverages_idx_beverage_id` (`beverage_id`);
ALTER TABLE `event_options` ADD INDEX `event_options_idx_event_id` (`event_option_id`);
ALTER TABLE `events` ADD INDEX `events_idx_event_id` (`event_id`);
ALTER TABLE `features` ADD INDEX `features_idx_feature_id` (`feature_id`);
ALTER TABLE `foods` ADD INDEX `foods_idx_food_id` (`food_id`);
ALTER TABLE `space_requirements` ADD INDEX `space_requirements_idx_space_id` (`space_requirement_id`);
ALTER TABLE `styles` ADD INDEX `styles_idx_style_id` (`style_id`);
ALTER TABLE `types` ADD INDEX `types_idx_type_id` (`type_id`);
ALTER TABLE `venue_beverages` ADD INDEX `venue_beverages_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_event_options` ADD INDEX `venue_options_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_events` ADD INDEX `venue_events_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_features` ADD INDEX `venue_features_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_foods` ADD INDEX `venue_foods_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_space_requirements` ADD INDEX `venue_requirements_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_styles` ADD INDEX `venue_styles_idx_venue_id` (`venue_id`);
ALTER TABLE `venue_types` ADD INDEX `venue_types_idx_venue_id` (`venue_id`);

The optimized query:

SELECT
        DISTINCT venues.name,
        locations.location,
        events.event,
        types.type,
        foods.food,
        beverages.beverage,
        event_options.event_option,
        styles.style,
        space_requirements.space_requirement,
        features.feature 
    FROM
        (SELECT
            * 
        FROM
            venues v LIMIT $offset,
            $limit) venues 
    INNER JOIN
        locations 
            ON venues.location_id = locations.location_id 
    LEFT JOIN
        venue_events 
            ON venues.venue_id = venue_events.venue_id 
    LEFT JOIN
        events 
            ON events.event_id = venue_events.event_id 
    LEFT JOIN
        venue_types 
            ON venues.venue_id = venue_types.venue_id 
    LEFT JOIN
        types 
            ON types.type_id = venue_types.type_id 
    LEFT JOIN
        venue_foods 
            ON venues.venue_id = venue_foods.venue_id 
    LEFT JOIN
        foods 
            ON foods.food_id = venue_foods.food_id 
    LEFT JOIN
        venue_beverages 
            ON venues.venue_id = venue_beverages.venue_id 
    LEFT JOIN
        beverages 
            ON beverages.beverage_id = venue_beverages.beverage_id 
    LEFT JOIN
        venue_event_options 
            ON venues.venue_id = venue_event_options.venue_id 
    LEFT JOIN
        event_options 
            ON event_options.event_option_id = venue_event_options.event_option_id 
    LEFT JOIN
        venue_styles 
            ON venues.venue_id = venue_styles.venue_id 
    LEFT JOIN
        styles 
            ON styles.style_id = venue_styles.style_id 
    LEFT JOIN
        venue_space_requirements 
            ON venues.venue_id = venue_space_requirements.venue_id 
    LEFT JOIN
        space_requirements 
            ON space_requirements.space_requirement_id = venue_space_requirements.space_requirement_id 
    LEFT JOIN
        venue_features 
            ON venues.venue_id = venue_features.venue_id 
    LEFT JOIN
        features 
            ON features.feature_id = venue_features.feature_id